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This manual is concerned with the methods of waterproofing all types of soil construction.The first and easiest way to obtain a waterproofing agent from a tree is through Its sap. Since many trees will not have a free flowing sap, and many that do not have useful sap, all kinds of trees must be tested. 

11019-BK

A VITA Publication

11 pages, illustrated

Detail Penerbitan

  • Penerbit: Volunteers in Technical Assistance,
  • Dewey Decimal: 691.99
  • Perpustakaan ECHO: 691.99 BOA