1. Food of vertebrate predators on trout waters in North Central Lower Michigan;Alexander;Mich. Acad.,1977
2. Biological and ecological aspects of populations of Nycticorax nycticorax and Egretta garzetta breeding in the Hulek reserve and their influence on fish farms in the Hulek valley;Ashkenazi,1983
3. Coexistence of herons and fisheries;Ashkenazi;S.-Africa. J. Sc.,1985
4. Predation of fish in farm dams by cormorants Phalacrocorax spp.;Barlow;Austr. Wildl. Res.,1984