1. Joint action of mixture of toxicants on aquatic organisms;Alabaster;Chemy Ind.,1981
2. Waterfowl populations and the changing environment of the Illinois River valley;Bellrose;Bull. Ill. nat. Hist. Surv.,1979
3. Development and evaluation of a flow-through growth inhibition test with duckweed (Lemna minor);Bishop;Am. Soc. Test & Mater.,1981
4. Comparison of static-replacement and flow-through bioassays using duckweed, Lemma gibba G-3;Davis;US EPA 560/6-81-003,1981
5. The uptake of boron by Lemna minor;Glandon;Aquat. Bot.,1978