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Filters: Keyword is vonder rigs  [Clear All Filters]
1995
G. B. Save the C. London, “Mchinji comic relief water project : annual report : April 1995 to September 1995”. Save the Children (UK), London, UK, p. ii, 11 p. : 2 tab., 1995.
1986
S. Laver, “Water for all : step by step instructions for using a hand operated drilling rig”. Blair Research Laboratory, Harare, Zimbabwe, p. 8 p.: fig., 1986.
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