China azolla propagation and small-scale biogas technology.

Sonraí bibleagrafaíochta
Údar corparáideach:	Food and Agriculture Organization of the United Nations
Formáid:	LEABHAR
Teanga:	English
Foilsithe / Cruthaithe:	Rome FAO 1979.
Sraith:	FAO soils bulletin 41.
Ábhair:	Azolla > Econ. aspects. Ferns > China. Waste products as fuel. Biogas.