00363nam a2200109Ia 450000500170000008000170001724501240003426000250015830000110018350000400019458300190023420260716043056.0  a16.04.02 I61  aSanitation in developing countries : proceedings of a workshop on training held in Lobatse, Botswana, 14-20 August 1980  bIDRCaOttawaCAc1980  a172 p.  aIncludes bibliographical references  c3/7/00kM2LMGR