Hookworm infections.
Card's contents:BALL P.A.J.[red.] 549,591 HOOKWORM Hookworm infections /ed. by H.M. Cilles and P.A.J Ball. - Amsterdam [etc.] : Elsevier, 1991. - [14], 253 s. : wykr. ; 24 cm (Human Parasitic Diseases, ISSN 0169-3727 ; vol. 4) ISBN 0-444-81243-1