TY  - BOOK
ED  - Weed Science Society of America
TI  - North american directory of federal, provincial and state weed scientists, Canada, Puerto Rico, United States of America
U1  - 632.58 
PY  - 0000///(s.a.)
CY  - (s.l.
PB  - s.e.)
KW  - Malas hierbas
KW  - Investigación
KW  - Directorios
N1  - La biblioteca tiene: 1979
ER  -