Mann, H T
Water treatment and sanitation : a handbook of simple methods for rural areas in developing countries - 2nd - London: Intermediat Technology, 1979. - 92p
eng
090303123X
Rural development
628.7 / MAW
Water treatment and sanitation : a handbook of simple methods for rural areas in developing countries - 2nd - London: Intermediat Technology, 1979. - 92p
eng
090303123X
Rural development
628.7 / MAW