]
(1991). Agri-environmental policy in the U.S. and EC: The effect of fertilizer policies on production and trade of wheat and corn.
The Ohio State University. Ann Arbor.
(1991). An alga-like organism associated with an outbreak of prolonged diarrhea among foreigners in Nepal.
The American Journal of Tropical Medicine and Hygiene. 45, pp. 383–389.
(1991). Animal reservoirs of schistosomiasis.
Parasitic helminths and zoonoses in Africa. 8, pp. 224-236.
(1991). Anthelmintics for cats and dogs.
Anpar Books. Berkhamsted, Herts., England.
(1991). Bacteriophages as model viruses in water quality control.
Water Research. 25, pp. 529–545.
(1991). Bacteriophages as model viruses in water quality controlag.
Water Research. 25(5), pp. 529–545. doi: 10.1016/0043-1354(91)90126-B.
(1991). Blastocystis hominis – past and future.
Clinical Microbiology Reviews. 4, pp. 61-79.
(1991). Cercarial shedding patterns of Schistosoma bovis and S. haematobium from single and mixed infections of Bulinus truncatus.
Journal of Helminthology. 65, pp. 8-14.
(1991). Changes in the surface of Leptospira interrogans serovar Grippotyphosa during in vitro cultivation.
Infect. Immun. Infect. Immun.. 59, pp. 1131-1140.
(1991). Characterization of outer membrane and secreted proteins of Leptospira interrogans serovar pomona.
Microb Pathog.Microb Pathog.. 10, pp. 311-322.
(1991). Cholera associated with imported frozen coconut milk-Maryland, 1991.
Morbidity and Mortality Weekly Report. 40, pp. 844–845.
(1991). Commission Decision of 19 March 1991 adopting protective measures against cholera in Peru in respect of imports (91/146/EEC).
Official Journal of the European Communities. L 73, pp. 35.
(1991). Community control of Ascaris lumbricoides in rural Oyo State, Nigeria: mass, targeted and selective treatment with levamisole.
Parasitology. 103, pp. 291–298. doi: 10.1017/S0031182000059564.
(1991). Community control of Ascaris lumbricoides in rural Oyo State, Nigeria: mass, targeted and selective treatment with levamisole. journal =.
103, pp. 291–296.
(1991). Community financing: the urban health card in Chiangmai, Thailand.
University of London, London School of Hygiene and Tropical Medicine (United Kingdom). Ann Arbor.
(1991). Comparison between semisolid Rappaport and modified semisolid Rappaport-Vassiliadis media for the isolation of Salmonella spp. from foods and feeds.
Int J Food MicrobiolInt J Food Microbiol. 14, pp. 51-7.
(1991). Comparison of cloth, paper, and warm air drying in eliminating viruses and bacteria from washed hands.
(1991). Comparison of the survival of Campylobacter jejuni and Campylobacter coli in culturable form in surface water.
Canadian Journal of Microbiology. 37, pp. 530-533.
(1991). Cost recovery and local resource mobilization in irrigation systems in Nepal: Three case studies from the Rapti zone.
Syracuse University. Ann Arbor.
(1991). Current status of Food-borne parasitic zoonoses in Japan.
Southeast Asian Journal of Tropical Medicine and Public Health. 22, pp. 48–53.
(1991). A cyst-like stage of Blastocystis hominis.
International Journal for Parasitology. 21, pp. 613–615.
(1991). The daily cercarial emission rhythm of Schistosoma margrebowiei with particular reference to dark period stimuli.
J Helminthol. 65, pp. 159-68.
(1991). Decentralizing water supply services in developing countries: factors affecting the success of community management.
Public administration and development. 11, pp. 415–430.
(1991). Determining Giardiasis prevalence by examination of sewage.
Water Science and Technology. 24, pp. 173–178.
(1991). Diagnosis of human schistosomiasis by detection of circulating cathodic antigen with a monoclonal antibody.
J Infect Dis. 164, pp. 1010-3.