Advice to farmers on snail fever (Schistosomiasis).

Manylion Llyfryddiaeth
Awdur Corfforaethol:	Philippines (Republic) Dept. of Health. Division of Health Education and Information
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	[Manila National Media Production Center 19--]
Pynciau:	Schistosomiasis.