ARCHIBALD, H M The appearance of P. falciparum resistant to pyrimethamine in a northern Nigerian village. [electronic resource] - The West African medical journal Feb 1960 - 21-5 p. digital Publication Type: Journal Article ISSN: 0043-3004 Subjects--Topical Terms: Antimalarials--pharmacologyMalaria, FalciparumPlasmodium falciparum--pharmacologyPyrimethamine