633.2
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Easter School in Agricultural Science (6th : 1959 : Nottingham)
The measurement of grassland productivity : proceedings of the University of Nottingham Sixth Easter School in Agricultural Science, 1959 / edited by J. D. Ivins.
— London : Butterworths Scientific Publications, 1959. viii, 217 p., [3] p. de fot. : gráf. ; 23 cm.
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