"Paper presented to The International Fertiliser Society at a symposium in Lisbon, on 5th March 2001" - T.p.
Nutritional and toxicological quality comparisons between organic and conventionally grown foodstuffs by Jorma T. Kumpulainen. ISBN 0853101086. Published by International Fertiliser Society in 2001. Publication and catalogue information, links to buy online and reader comments.