David Holmgren was the research student and co-originator with Bill Mollison, his research supervisor, of the permaculture concept.
David HolmgrenScience, Environment, Sustainability, Permaculture - David Holmgren. David Holmgren was the research student and co-originator with Bill Mollison, his research supervisor, of the permaculture concept.
David Holmgren was the research student and co-originator with Bill Mollison, his research supervisor, of the permaculture concept.
David Holmgren