AVM        Vladimir Agapov, net postings
AWST       Aviation Week
Barensky   Stefan Barensky, personal communication
CCMOPS     Cape Canaveral historical records
CNES32     CNES history book
ESAPR      ESA press release
Energiya   Energiya history book
ExpInOrbit Explorers In Orbit, MSFC, 1960
GWU        George Washington Univ. 
Grahn-WWW  Sven Grahn's web page
Henderson  B. Henderson, personal comm
ISIR       Intl. Space Industry Report
JBIS       Journal of the BIS
JG         J. Geiger, VAFB History Office
JPL        JPL technical reports
Jupiter    Jupiter history, Redstone Arsenal
KHR-1      KSC Historical Report-1
KIAM       Vladimir Agapov's web page at KIAM
LAAFB      Los Angeles AFB history office
LR         Lompoc Record newspaper
Lissov     Igor Lissov, personal comm.
MIR        Chris van den Bergh's Mir News
MSFCFLASH  NASA MSFC STS flash report
McDonald-B B. McDonald, personal comm.
Morton     Morton, Fire across the Desert (Woomera history)
NASA-TM    NASA Tech Memo
NezavB     Nezav. Baykonur
NK         Novosti Kosmonavtiki
NOTS       NOTS satellite program files, NASM
NRO        National Reconnaissance Office declassified archives
NYT        New York Times
Ransom     Martin Ransom, personal comm.
PER        National Reconnaissance Office declassified archives
PH         Peter Hunter, personal comm.
POES-WWW   POES web site
PR/AE      Arianespace press release
Petrov71   G. Petrov, Soviet Space Research 1967-1970
RAE        Launch time estimated to 0.01 day from RAE tables
Rosenberg  J. Rosenberg, personal comm
Rothmund   C. Rothmund, Europa et Cora.
SAC7383    SAC-7383, DMSP launch history
SP         NASA special publication
STSJSC     NASA-JSC Shuttle records
Seesat-L   Seesat-L email list
Sergeev96  Sergeev, Plesetsk press release
Stein      K. Stein, personal comm.
TASS       TASS wire service
TLE        Estimated from orbital data
Thor       Arms, 1972, History of the Thor
Tiziou     J. Tiziou, personal comm.
VCR        Vandenberg Launch Commanders Reports, declassified.
VSA        Sergey Voevodin, net postings
WWW-FAST   FAST web page
WWW-NASDA  NASDA web page
Wire       Wire stories (AP, Reuter, TASS etc)