Showing 1 - 2 results of 2 for search 'Ryan, Beverley A.', query time: 0.01s Refine Results
  1. 1

    Pit latrine ventilation field investigation methodology by Ryan, Beverley A.

    Published 1983
    Book

    Pit latrine ventilation field investigation methodology
  2. 2

    Ventilated improved pit latrines vent pipe design guidelines by Ryan, Beverley A.

    Published 1983
    Book

    Ventilated improved pit latrines vent pipe design guidelines

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