Hemp Horizons(1st Edition) The Comeback of the World's Most Promising Plant (The Real Goods Solar Living Book) von JohnW. Roulac Paperback, 226 Seiten, Veröffentlicht 1997 von Chelsea Green Publishing Company ISBN-13: 978-0-930031-93-0, ISBN: 0-930031-93-8
"The Cultivation of Hemp: Botany, Varieties, Cultivation and Harvesting Paperback - March, 1998 by Ivan Bocsa (Author), Ivan Bosca (Author), Michael Karus (Author)"
Backyard Composting Roulac, John(2nd Edition) von JohnRoulac Paperback, 96 Seiten, Veröffentlicht 1990 von Green Earth Books (An Imprint Of Green Books) ISBN-13: 978-1-900322-11-9, ISBN: 1-900322-11-0
"Composting at home reduces your personal volume of rubbish, conserves water, increases plant growth, replaces the need for toxic chemical fertilizers and pesticides, and is also fun."
Industrial Hemp Practical Products - Paper to Fabric to Cosmetics von JohnW. Roulac Paperback, 48 Seiten, Veröffentlicht 1996 von Hemptech ISBN-13: 978-1-886874-00-8, ISBN: 1-886874-00-X