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Filters: Keyword is ventilated improved pit latrines and Author is Belz, L.H.  [Clear All Filters]
1987
L. H. Belz, “Pit latrine”, Journal of ferrocement, pp. p. 141-148: fig., 1987.
1986
L. H. Belz, “Precasting fibrous ferrocement sanitary units”. Lloyd H. Belz, Nuku'alofa, Tonga, p. 46 p.: photogr., techn. drwgs, 1986.
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