TY  - BOOK
ED  - American Geological Institute.
TI  - Investigating the earth: teacher's manual 
AV  - QE28.2QE28 .T37 1987.I5
U1  - 551.4 19
PY  - 1984///
CY  - Boston
PB  - Houghton Mifflin Co.
KW  - Geology
KW  - Study and teaching
KW  - Physical geology
N1  - Includes bibliographical references and index
ER  -