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R. P. Pharis

P.P. · R. P. · Richard P. Pharis

titleISBN-13
(ISBN-10)		year of publication
Plant Growth Substances, 1988978-0-387-50857-3
(0-387-50857-0)		1991
Role of Environmental Factors978-0-387-10197-2
(0-387-10197-7)		1985

R. P. Philp