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  1. 1
    Hand pump maintenance in the context of community well projects : an Oxfam document /
    por Pacey, Arnold
    Publicado 1977
    Originally published: as 'Hand pump maintenance and the objectives of community well projects'. Oxford : Oxfam, 1976.
    Libro
  2. 2
    Better tools for the job : specifications for hand tools and equipment /
    por Armstrong, William, 1916-
    Publicado 1980
    Libro
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