Water conservation.

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Bibliographic Details
Corporate Authors: Papua New Guinea, Papua New Guinea. Dept. of Information and Extension Services
Format: Book
Published: Port Moresby : Dept. of Information and Extension Services for Dept. of the Treasury, 1973.
Subjects:
Water conservation
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Table of Contents:
  • Contents: Bk.1 For primary level students-- Bk.2 For secondary level students.

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