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H. Van Houten

H.H. · Helen Van Houten

titleISBN-13
(ISBN-10)		year of publica-
tion		other author(s)
Research with Farmers: Lessons from Ethiopia978-O-85198-814-6
(O-85198-814-8)		1992S.Scherr Franzel · Helen Van Houten

H. van Kampen