PRITCHARD, D I, QUINNELL, R J, SLATER, A F, MCKEAN, P G, DALE, D D, RAIKO, A and KEYMER, A E, 1990. Epidemiology and immunology of Necator americanus infection in a community in Papua New Guinea: humoral responses to excretory-secretory and cuticular collagen antigens. Parasitology (Cambridge). 100 Pt 2, 317-26