LITERATURE CITED
- Golterman , H. L. , Clymo , R. S. and Ohmstad , M. A.M. 1978 . Methods for Physical and Chemical Analysis of Fresh Waters. IBP Handbook No. 8 Oxford : Blackwell Scientific Publications .
- Hosmer , D. W. and Lemeshow , S. 1989 . Applied Logistic Regression 307 John Wiley & Sons .
- Jones , H. 1993 . Water velocity as a control of aquatic snails in concrete canal systems for irrigation. PhD thesis, Loughborough University of Technology, England 252
- Khallaayoune , K. and Laamrani , H. 1992 . Seasonal patterns in the transmission of Schistosoma haematobium in Attaouia, Morocco . J. Helmint. , 66 : 89 – 95 .
- Khallaayoune , K. , Stromberg , B. E. and Ramdani , M. “ Distribution of Lymnaea spp. and their potential role in the transmission of Fasciola hepatica in Morocco ” . In J. Med. Appl. Malacol. (in press)
- Kristensen , T. K. 1985 . Guide pratique des gastéropdes d'eau douce africains: 7. Espèces présentes en Afrique du Nord-Ouest. Danish Bilharziasis Laboratory, Charlottenlund, Denmark 30
- Madsen , H. , Daffalla , A. A. , Karoum , K. O. and Frandsen , F. 1988 . Distribution of freshwater snails in irrigation schemes in the Sudan . J. Appl. Ecol. , 25 : 853 – 866 .
- Markowski , S. 1953 . The distribution of the molluscan vectors of schistosomiasis in the Sennar area of the Sudan, and their invasion of the Gezira irrigation system . Ann. Trop. Med. Parasit. , 47 : 375 – 380 .
- Meyer-Lassen , J. 1992 . “ Studies on snail populations in the Rahad Agricultural Scheme, the Sudan, with special emphasis on Bulinus truncatus (Audouin) and Biomphalaria pfeifferi (Krauss)(Gastropoda: Planorbidae), snail intermediate hosts for species of the genus ” . In Schistosoma. Ph.D. thesis, University of Copenhagen. 68
- Thomas , J. D. and Tait , A. J. 1984 . Control of the snail hosts of schistosomiasis by environmental manipulations: a field and laboratory appraisal in the Ibadan area, Nigeria . Phil. Trans. Roy. Soc. Lond. , 305 : 201 – 253 . B
- Van Damme , D. 1984 . The freshwater mollusca of Noah Africa. Dr. W. Junk Publishers, Dordresht, The Netherlands 164
- Zar , J. H. 1985 . Biostatistical analysis. 718 UK : Prentice-Hall .