Moore, Howard Dale2015-05-122015-05-121968https://scholarworks.montana.edu/handle/1/5764enThistlesHerbicidesDichlorophenoxyacetic acidWeeds--ControlEpidermal cell/stoma ratio, stomatal area, and 2,4-D C14 penetration of Canada thistle ecotypes as related to 2,4-D responseThesisCopyright 1968 by Howard Dale Moore