TY  - BOOK
ED  - Earth Science Curriculum Project.
ED  - American Geological Institute.
TI  - Investigating the earth: teacher's guide
U1  - 550 
PY  - 1965///
CY  - Colorado
PB  - Johnson
KW  - Earth sciences
KW  - Earth
N1  - Conducted by the American Geological Institute; supported a grant fr om the National Science Foundation; Includes index
ER  -