TY  - BOOK
AU  - Villegas,Arturo N.
TI  - Integrated science with emphasis on earth science
SN  - 9716840357
AV  - Q 161 .I61113 1994
PY  - 1999///4]
CY  - MarikinaCity
PB  - Academe Publishing House
N1  - Include Index
ER  -