TY  - BOOK
ED  - Conservation Council of Ontario
ED  - Soil Conservation Society of America. Ankeny, Iowa.
TI  - A conference on erosion: : causes, effects, controls
U1  - 631.455 
PY  - 1972///
CY  - Toronto
PB  - (s.e.)
KW  - Erosión
KW  - Prevención y control
ER  -