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  1. 1
    Hydraulic ram /
    por Inversin, Allen R.
    Publicado 1985
    A Vita publication.
    Libro
  2. 2
    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
  3. 3
    Six simple pumps : a construction guide/
    Publicado 1983
    Libro
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