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S592.8
.H86 1990
631.417
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Humic substances in soil and crop sciences : selected readings : proceedings of a symposium cosponsored by the International Humic Substances Society ... Chicago, Illinois, 2 December 1985 / editors, P. MacCarthy ... [et al.].
— Madison, Wis., USA : American Society of Agronomy : Soil Science Society of America, 1990. xvii, 281 p. : il. ; 24 cm.
Incluye referencias bibliográficas e índice.
ISBN 0891181040
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