TY  - BOOK
AU  - Hosmer, George Leonard.
TI  - Practical astronomy; a textbook for engineering schools and a manual of field methods
U1  - 522 
PY  - 1925///
CY  - New York
PB  - Wiley
KW  - AstronomÃ­a esfÃ©rica y prÃ¡ctica
ER  -