Coal-derived humus : plant growth effects / by Philip G. Freeman and Walter W. Fowkes.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington, D.C.] :
U.S. Dept. of the Interior, Bureau of Mines,
[1968]
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| Series: | Report of investigations (United States. Bureau of Mines) ;
7203. |
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| Item Description: | "November 1968"--Cover. |
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| Physical Description: | 16 pages : illustrations ; 26 cm. |
| Bibliography: | Bibliography: pages 15-16. |