Crosby D G, Tucker R K
Science. 1966 Oct 14;154(3746):289-91. doi: 10.1126/science.154.3746.289.
Accurate determination of the acute toxicities of a series of 16 aquatic herbicides to Daphnia magna reveals that several of them may present a hazard to food-chain microfauna whether the compounds are environmentally destroyed or not.