Sources are given in abbreviated format in the census. The list below includes the abbreviations used for books, authentication services, journals, auctions, and exhibits.
ABA – Alan Blair (auctions)
AHA – American Historical Auctions (auctions)
APCB – American Philatelic Congress Book, (book series)
APEX – American Philatelic Expertizing Service
APSJ – American Philatelistt (journal)
ASDC – The American Stamp Dealer & Collector (journal)
AVRY – The Avery Collection of the Postage Stamps of the World (1909 book by Peckitt)
AZ – Al Zimmerman (auctions)
BWB – Bruce W. Ball (auctions)
CEP – Carl E. Pelander (auctions)
CG – Christoph Gärtner (auctions – Bietigheim-Bissingen, Germany)
CHR – Christie’s (auctions)
CHY – Cherrystone Auctions
COLJ – The Collectors’ Journal
CONA – Confederate Stamp Album (journal)
CONP – Confederate Philatelist (journal)
CPC – Confederate Patriotic Covers and Their Usages (1991 book by Benjamin Wishnietsky)
CPPV – The Confederate Postmaster Provisionals of Virginia (2011 book by Richard L. Calhoun)
CRL – Christie’s Robson Lowe (auctions – New York)
CS – Collector’s Shop (auctions)
CSA – Confederate Stamp Alliance Authentication Service (changed to Civil War Philatelic Authentication Service)
CSAX – Exhibit on Confederate Stamp Alliance Website
CSACH – Confederate States of America Catalog and Handbook of Stamps and Postal History (Kaufmann, Crown, and Palazolo – book)
CSLH – Confederate Stamps Old Letters and History (book by Raynor Hubbell)
CSPR – Confederate States of America: The Special Postal Routes (1961 book by Lawrence L. Shenfield)
CSX – Philatelic Exhibit on US Philatelic Classic Society website
CWP – The Civil War Philatelist (journal)
CWPAS – Civil War Philatelic Authentication Service (formerly the Confederate Stamp Alliance Authentication Service)
CWPC – Civil War Prisons and their Covers (1961 book by Earl Antrim)
CWPSX – Exhibit or collection on Civil War Philatelic Society website
DGP– David G. Phillips Co. (auctions)
DF – David Feldman USA (auctions)
DFA – Die Ferrary-Auktionen (The Ferrary Auctions) (1987 book by Joachim Erhardt)
DFK – Daniel F. Kelleher Auctions
DFU – David Feldman USA (auctions)
DIXP – Dixie Philatelist (journal)
EJF – Edson J. Fifield (auctions)
EMC – Edgar Mohrmann & Co (auctions – Hamburg, Germany)
ENC – Eugene J. Costales (auctions)
FEPX –Exhibits and Presentations on Richard C. Frajola’s website
FPHCW – Florida Postal History During the Civil War (2017 book by Deane R. Briggs)
FPM – Frajola PhilaMercury website
FSA – Florida Stamp Auctions
GOSS – Weekly Philatelic Gossip (journal)
GPR – Georgia Post Roads (journal)
HA – Heritage Auctions
HRC – Harmer Rooke & Co. (auctions – New York)
HRH – H. R. Harmer, New York (auctions)
HRL – Harmer Rooke & Co. (auctions – London)
HSA – Harmer-Schau Auctions
JAF – John A. Fox (auctions)
JBDL – James B. Duke University Library, Furman University
JWK – John W. Kaufmann (auctions)
L&S – Laurence & Stryker (auctions)
LOND – London Philatelist (journal)
LSN – Lowell S. Newman (auctions)
MASN – Mason’s Coin and Stamp Collectors’ Magazine (journal)
MB – Matthew Bennett (auctions)
MESC – Mekeel’s Stamp Collector (journal)
NPM – National Postal Museum
NSOP – New Southern Philatelist (journal)
NUT – Nutmeg Auctions
OPOM – Organization of the Confederate Post Office Department at Montgomery (1960 book by Peter A. Brannon)
P&K – Phillips and Kennett (auctions)
PF – Philatelic Foundation (authentication service)
PGD – Percy G. Doane Auctions
PHGZ – Philatelic Gazette (journal)
PHJA – Philatelic Journal of America (journal)
PPH – Postmasters’ Provisionals: United States and Confederate States (2016 book by Erivan Haub)
PWF -Perry W. Fuller (auctions)
RAS – Robert A. Siegel (auctions)
RCF – Robert C. Frajola (auctions)
RCFS – Robert C. Frajola (sales)
RFA – R. A. Albrecht & Co (auctions)
RFS – Robert C. Frajola Sales (internet)
RGK – Robert G. Kaufmann (auctions)
RL – Robert Laurence (auctions)
RLN – Robson Lowe (auctions – New York)
RSA – Regency-Superior Auctions
RSC – Rasdale Stamp Co. (Auctions)
RWA – Richard Wolfers Auctions
SCOC – Stamp and Cover Collecting (journal)
SCOT – Scott’s Monthly Stamp Journal (journal)
SCPP – Surveys of the Confederate Postmasters’ Provisionals (1982 book by Francis J. Crown, Jr.)
SCRE – Stamp and Cover Collectors’ Review (journal)
SIA – Steve Ivy Auctions
SL – Steves List
SMR – Special Mail Routes of the American Civil War: A Guide to Across-the-Lines Post History (2008 book by Steven C Walske and Scott R. Trepel)
SPB – Sotheby Parke Bernet (auctions)
SPG – Shreves Philatelic Galleries (auctions)
SPK – Spink Shreves (auctions)
SR – Schuyler Rumsey (auctions)
STSP – Stamp Specialist, (book series)
STAM – Stamps (New York) (journal)
TDPP – Texas The Drama of Its Postal Past (1970 book byAlex L. ter Braake)
VIPH – Virginia Philatelist (journal)
WAF – William A. Fox (auctions)
WPER – The Weekly Philatelic Era (journal)