1. The influence of flight altitude and type of film on photointerpretation of aquatic: macrophytes;Almkvist;Svensk Botanisk Tidskrift,1975
2. Investigation of species and distribution of aquatic weeds in the irrigation and drainage systems of Turkey;Altinayar;Bitki Kornma Bulteni,1982
3. Growth, reproduction and control of Hydrilla verticillata Royle (L.f.) in an irrigation system in South Western U.S.;Anderson,1982
4. Recent developments and future trends in aquatic weed management;Anderson,1986
5. Water plants in the Gezira canals;Andrews;Annals of Applied Biology,1945