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  1. 1
    Crushed stone and sand and gravel production by state districts : 1985-1986 /
    by Tepordei, Valentin V.
    Published 1989
    Government Document Book
  2. 2
    Directory of principal sand and gravel producers in the United States in ...
    Government Document Serial
  3. 3
    Characterization of the 1986 sand and gravel mining workforce /
    by Butani, Shail J.
    Published 1988
    Government Document Microform Book
  4. 4
    Sand and gravel (industrial) in ... /
    Government Document Microform Serial
  5. 5
    Directory of principal sand and gravel producers in the United States in ...
    Government Document Microform Serial
  6. 6
    Sand and gravel (construction) in ... /
    Government Document Microform Serial
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