LIBROS DEL AUTOR: pam fadem

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  • Sanitation and Cleanliness for a Healthy Environment
    Jeff Conant / Pam Fadem
    This selected material from Hesperian’s Community Guide to Environmental Health offers 48 pages of information on basic sanitation and hygiene, including instructions on building safe, affordable, environmentally-friendly sanitation systems, as well as learning activities to help communities understand and prevent sanitation-related health problems. ...
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    11,79 €