Biblio

I. N. Central Pu Nagpur, «Problems in water treatment : proceedings of symposium, Nagpur, India, 29th & 30th Oct. 1964,». Central Public Health Engineering Research Institute, Nagpur, India, p. iv + 394 p. : fig., tab., 1964.

National Environmental Engineering Research Institute -Nagpur, IN, NEERI, «Iron removal plant in ferro-cement construction and maintenance». National Environmental Engineering Research Institute, NEERI, Nagpur, India, p. 40 p. : tab., techn. drwngs.

W. Supply Ind GB y London, G. B. Industrial, «Manual for the training of filter attendants». Industrial Training Service (ITS), London, UK, p. 56 p.: fig.