1. E.G. Budd(1970 ) The selective control of Poa trivialis. Poa annua. Alopecurus myosuroides and some broad-leaved weeds in grass crops grown for seed Proc. lOth Br. Weed Conlrol Conf.1970 , 500 -505 .
2. E.G. Budd, and J.P. Shul dricke(1968 ) Preliminary observations of competition between, Alopecurus myouroides (black-grass) and grass seed crops , Proc. 9th Br. Weed Conlrol Conf.1968 , 9 -13 .