Microhabitat Preferences of Biomphalaria pfeifferi and Lymnaea natalensis in a Natural and a Man-made Habitat in Southeastern Tanzania Jürg Utzinger, Marcel Tanner PAGE: 287-294

Studies on the Biology of Schistosomiasis with Emphasis on the Senegal River Basin VR Southgate, L-A Tchuem Tchuenté, M Sène, D De Clercq, A Théron, J Jourdane, BL Webster, D Rollinson, B Gryseels,J Vercruysse PAGE: 75-78

Evaluation of Chemical and Physical-morphological Factors as Potential Determinants of Biomphalaria pfeifferi (Krauss, 1848) DistributionJürg Utzinger, Charles Mayombana, Konstanze Mez, Marcel Tanner PAGE: 323-328