Marketable phosphate rock ... crop year [microform]
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Corporate Authors: | , , |
Format: | Government Document Microfilm Serial |
Language: | English |
Published: |
Washington, DC :
U.S. Dept. of the Interior, Bureau of Mines.
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Series: | ASI microfiche library. Non-depository collection ;
ASI 5664-24. ASI microfiche library. Non-depository collection ; ASI 5614-20. Mineral industry surveys. |
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