00566nam a22001217a 4500008004100000040005500041080002500096245019100121260008900312300001000401650001200411700002100423230427b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a504.3.06(082.2) bM2  aBiological indicators and indices of environmental pollution: c/ Proceedings of the workshop held at Osmania University, Hyderabad, India during 21-23 September, 1981 under a WHO grant   aNew Delhi: bCentral Board for the Prevention and Control of Water Pollution, c1982  a209p.  aScience  aZafar, A R (Ed.)