TY  - BOOK
AU  - Shelburne Films.; AGC Educational Media
TI  - How much does the earth weigh? : : measurement & mass
SN  - VCD
AV  - 631.43 H83 c1995 
PY  - 1995///
CY  - Evanston, IL
PB  - AGC Educational Media
KW  - Soil physics
KW  - Juvenile films
KW  - Soils
KW  - Composition
ER  -