The Biology of Schistosoma mansoni in Laboratory Rats von Ritchie, Lawrence S., Garson, Seymour, Knight, Wilda B.

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PARASITOLOGICAL STUDIES IN THE FAR EAST von RITCHIE, LAWRENCE S., HUNTER III, GEORGE W., FREYTAG, ROBERT E., PAN, CHIATUNG, YOKOGAWA, MUNEO, LIN, SUNG SHENG, SHIMIZU, MITSUAKI, HISHINUMA, YOSHIMASA, ASAKURA, SOICHI, KNOX, CARROL B.

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PARASITOLOGICAL STUDIES IN THE FAR EAST: XII. AN EPIDEMIOLOGIC SURVEY IN SHIZUOKA PREFECTURE, HONSHU, JAPAN von RITCHIE, LAWRENCE S., HUNTER, GEORGE W., III, FREYTAG, ROBERT E., PAN, CHIATUNG, YOKOGAWA, MUNEO, LIN, SUNG SHENG, SHIMIZU, MITSUAKI, HISHINUMA, YOSHIMASA, ASAKURA, SOICHI, KNOX, CARROL B.

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Molluscicidal activity of the Puerto Rican Weed,Solatium nodiflorum, against snail hosts ofFasciola hepatica von Medina, Freddy R., Ritchie, Lawrence S.

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Molluscicidal Activity of the Puerto Rican Weed, Solanum nodiflorum, against Snail Hosts of Fasciola hepatica von Freddy R. Medina, Ritchie, Lawrence S.

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Immunoprecipitins in Schistosoma mansoni infections: II. Cercopithecus sabaeus and Macaca mulatta monkeys von Hillyer, George V., Ritchie, Lawrence S.

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Populations dynamics of Australorbis glabratus in Puerto Rico von Ritchie, Lawrence S., Radke, Myron G., Ferguson, Frederick F.

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Comparative observations on growth rate and reproduction of Australorbis glabratus in field and laboratory conditions von Etges, F J, Ritchie, L S

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Field Observations on the Migration of Marked Australorbis glabratus Snails von Radke, Myron G., Ritchie, Lawrence S.

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A standardized field-plot dilution test for evaluating molluscicides against amphibious Oncomelania snails von Williams, James E., Ritchie, Lawrence S.

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EFFECT OF PH ON MOLLUSCICIDAL ACTIVITY OF BAYER 73 VS. AUSTRALORBIS GLABRATUS OF PUERTO RICO UNDER LABORATORY CONDITIONS von Fox,Irving, ritchie,Lawrence S, Frick,Lyman P

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Effects of water velocities on worm burdens of animals exposed to Schistosoma mansoni cercariae released under laboratory and field conditions von Radke, Myron G., Ritchie, Lawrence S., Rowan, William B.

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Labeling of Biomphalaria glabrata and cercariae of Schistosoma mansoni with radioselenium von Knight, Wilda B., Liard, Felix, Ritchie, Lawrence S., Pellegrino, J., Chiriboga, Jorge

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Effect of pH on molluscicidal activity of Bayer 73 vs. Australorbis glabratus of Puerto Rico under laboratory conditions von Fox, Irving, Ritchie, Lawrence S., Frick, Lyman P.

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Chlorine-Induced Resistance to Bayluscide in the Eggs of Australorbis glabratus von Fox, Irving, Rivera, Gisela A., Ritchie, Lawrence S.

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A Simple Procedure for Recovering Schistosome Eggs in Mass from Tissues von Ritchie, Lawrence S., Berrios-Duran, Luis A.

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Attempts to Induce Resistance against Schistosoma mansoni by Injecting Cercarial, Adult Worm, and Egg Homogenates in Sequence von Ritchie, Lawrence S., Garson, Seymour, Erickson, Duane G.

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MOLLUSCICIDAL QUALITIES OF DINEX (DINITRO-O-CYCLOHEXYLPHENOL) REVEALED BY 6-HOUR AND 24-HOUR EXPOSURES AGAINST REPRESENTATIVE STAGES AND SIZES OF AUSTRALORBIS GLABRATUS von RITCHIE, L S, FOX, I, FRICK, L P, BERRIOS-DURAN, L A

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Effect of the duration of Schistosoma mansoni infections on the degree of protection against subsequent exposures von Ritchie, Lawrence S., Frick, Lyman P., Knight, Wilda B., Berrios-Duran, Luis A.

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Enhancement of Acquired Resistance against Schistosoma mansoni in Albino Mice by Intraperitoneal Immunizing Exposures von Frick, Lyman P., Ritchie, Lawrence S., Knight, Wilda B., Taubr, Joseph H.

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