TY  - BOOK
AU  - Ynion,Eugenio,J.
TI  - Workbook in celestial navigation 1
SN  - 9719237541
U1  - 623.89 
PY  - 2003///
CY  - Philippines
PB  - Philippine Foundation for maritime teaching aids, Inc., 
KW  - Celestial navigation
KW  - workbook
ER  -