Possible health hazards in fish farming using sewage : paper presented at the Seminar on Appropriate Technology Transfer in water supply and Sanitation,, Thohoyardou Hotel-Venda, 28-30 September, 1983 [IWSA-CSIR]
by E. M. Nupen
Inglês
[S.l.] : 1983, [s.n.]
13, [1] p.; 30 cm