Studies about humus.

Studies about humus.

出版社：Prague: [s.n.] c1962.

出版年：1962

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Studies about humus : symposion Humus and Plant, Praha and Brno 28, IX-6X. 1961.

作者：Symposion Humus and Plant
出版社：Prague : Pub. House of the Czechoslovak Academy of Sciences, 1962.
出版年：1962

Chemicals, humus, and the soil : a simple presentation of contemporary knowledge and opinions about

作者：Hopkins,Donald Percy,
ISBN：CNY2.40
出版社：London : Faber and Faber, c1957.
出版年：1957

Chemicals, humus, and the soil : a simple presentation of contemporary knowledge and opinions about

作者：Hopkins,Donald Percy,
出版社：N.Y. : Chemical Pub. Co., 1948.,London : Faber, 1948,London : Faber and Faber, c1957.,London : Faber and Faber, 1957.
出版年：1957

Chemicals,humus,and the soil;a simple presentation of contemporary knowledge and opinions about fert

作者：Hopkins,Donald Percy.
ISBN：CNY 2.40
出版社：London: Faber and Faber, 1957.
出版年：1957

Chemical humus and the soil : a simple presentation of contemporary knowledge and opinions about fer

作者：Hopkins,Donald. Percy.98013
出版社：London: Faber and Faber, c1957.
出版年：1957

Chemicals,humus,and the soil;a simple presentation of contemporary knowledge and opinions about fert

作者：Hopkins,Donald Percy.
出版社：London: Faber and Faber, 1957.
出版年：1957