TY  - BOOK
AU  - Watkins,Ralph K.
AU  - Perry,Winifred
TI  - Science for daily use
U1  - 500 WAT P  
PY  - 1940///.
CY  - New York : 
PB  - The Macmillan Company, 
KW  - Earth science
KW  - Scientists
KW  - Space science
ER  -