TY  - RPRT
TI  - Extension of programs for calculations of great circle paths and sunrise-sunset times. 
AU  - Crary, J H
PY  - 1965
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 303
DO  - 10.6028/NBS.TN.303
ER  -