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  1. 1

    Guidelines in the acquisition of permit for sand and gravel and other construction materials

    Published 1990
    Book

    Guidelines in the acquisition of permit for sand and gravel and other construction materials
  2. 2

    Directory of mines and quarries

    Published 1987
    Book

    Directory of mines and quarries
  3. 3

    Directory of mines and quarries

    Published 1987
    Book

    Directory of mines and quarries
  4. 4

    Philippine Rock Industries, Incorporated grinding rock becomes a successful business venture by Ravenholt, Albert

    Published 1968
    Book

    Philippine Rock Industries, Incorporated grinding rock becomes a successful business venture
  5. 5

    Practical operating procedures for progressive rehabilitation of sand and gravel sites by Johnson, Craig

    Published 1966
    Book

    Practical operating procedures for progressive rehabilitation of sand and gravel sites
  6. 6

    Simultaneous excavation and rehabilitation of sand, and gravel sites by Bauer, Anthony M.

    Published 1965
    Book

    Simultaneous excavation and rehabilitation of sand, and gravel sites

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