Chakraborti, Jharna Studies on alteration in tissue urea and protein concentration and the rate of urea excretion during dehydration stress in an air-breathing fish : clarias batrachus - NEHU - Shillong NEHU, Dept. of Zoology 1983 - [10[,24p.;29cm. Dewey Class. No.: DS / 597.5804192 CHA