TY  - BOOK
AU  - Silver, Donald M.
TI  - The checkerboard press nature encyclopedia
SN  - 002689307
AV  - QH 48 .Si543 1990
U1  - GS 500  
PY  - 1990///.
CY  - New York : 
PB  - Checkerboard Press, 
KW  - World of nature
KW  - Natural science.
N1  - Includes index.
ER  -