The biogas/biofertilizer business handbook.
Arnott, Michael.
The biogas/biofertilizer business handbook. - 3rd. ed. - Batangas City : Philippine Center for Appropriate Technology and Training, 1985. - xvi , 186 p. : illus. ; 27 cm.
Includes appendices.
Biofertilizers.
Nitrogen -- Fixation.
The biogas/biofertilizer business handbook. - 3rd. ed. - Batangas City : Philippine Center for Appropriate Technology and Training, 1985. - xvi , 186 p. : illus. ; 27 cm.
Includes appendices.
Biofertilizers.
Nitrogen -- Fixation.