TY  - BOOK
AU  - Ynion, Eugenio J.
TI  - Terrestrial navigation 1 / 
SN  - 9719237538
AV  - FIL VK 555 Y55 2001
PY  - 2001///
CY  - Quezon City
PB  - Philippine Foundation for Maritime Teaching Aids, Inc. and the Author
KW  - Terrestrial navigation
ER  -