TY  - JOUR
AU  - Golipour, Hosein
AU  - mirshekari, bahram
AU  - hoseynzadehmogbli, amirhoshang
AU  - hanifiyan, shahram
TI  - Critical period of weeds control in sunflower, Helianthus annus L.
JO  - Agroecology Journal
VL  - 5
IS  - 4
SP  - 76
EP  - 82
PY  - 2010
DO  - 
ER  -