TY  - BOOK
AU  - Hesser, Dale T.
TI  - Focus on Science
SN  - 9780675026710
AV  - QE28 HES1989
PY  - 1989///
CY  - Columbus
PB  - Merril Pub.
KW  - Earth sciences-Textbooks
KW  - Earth sciences-Study and teaching (elementary)
ER  -