TY  - BOOK
AU  - Krasavtsev,Boris Ivanovich
AU  - Khlyustin,Boris Pavlovich
TI  - Nautical astronomy / 
U1  - 527 KRA 
PY  - 1970///
CY  - Moscow : 
PB  - Mir Publishers, 
KW  - Natural astrononmy
KW  - Navigation
ER  -