TY  - BOOK
ED  - Soil Conservation Society of America. Ankeny, Iowa
TI  - Acid precipitation: The North American Challenge
U1  - 551.573 
PY  - 1983///?]
CY  - Ankeny, Iowa
PB  - The Society
KW  - Acidez
KW  - Lluvia
N1  - 29-98
ER  -