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  1. 1

    Conservation rent in Philippine mining : empirical measurements and some policy implications by Abayan, Perfecto B.

    Book

    Conservation rent in Philippine mining : empirical measurements and some policy implications
  2. 2

    Report on the development of underdevelopment Perfecto Abayan ... [et al.]. -- [1981].

    Thesis

    Report on the development of underdevelopment Perfecto Abayan ... [et al.]. -- [1981].

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