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2. Quantitative measurements on skin snips of onchocerciasis patients;Brinkmann;Zeitschrift für Tropenmedizin und Parasitologie,1973
3. Onchocerciasis symptomatology, pathology, diagnosis,1974
4. The skin biopsy in the diagnosis of onchocerciasis: a comparative study of NCTC 135, saline and water;Collins;WHO/ONCHO/76.128, mimeographed document,1976