TY  - BOOK
ED  - Weed Science Society of America
TI  - Directory of personnel engaged in weed science: United States, Canada, Puerto Rico, México  
U1  - PA 632.58 W47 
CY  - s.l.
PB  -  s.e.
KW  - Malas hierbas
KW  -  investigación
KW  - directorios
ER  -