TY  - BOOK
ED  - Earth Science Curriculum Project.
ED  - American Geological Institute.
TI  - Investigating the earth
AV  - QE501 .E22
U1  - 550 
PY  - 1972///
CY  - Boston
PB  - Houghton Mifflin
KW  - Earth sciences
KW  - Earth (Planet)
N1  - Sponsored by the American Geological Institute; supported by the National Science Foundation; Includes bibliographical references and index
ER  -