"Paper presented to the International Fertiliser Society at a meeting in London, on 3rd April 2003"-T.p.
"Updated and adapted from the original which was presented by the late Gunnar Kongshaug"-T.p.
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Energy consumption and greenhouse gas emmissions in fertiliser production by Tore K. Jenssen. ISBN 0853101450. Published by International Fertiliser Society in 2003. Publication and catalogue information, links to buy online and reader comments.
