Varadarajan, Dhulasi Birundha Cost-benefit analysis of bio gas plants / Dhulasi Birundha Varadarajan and D Fatima Baby - New Delhi : Ashish Pub. House , 1995 . - xi,111 p . : ill. ; 20 cm. Includes Index and Bibliography. ISBN: 8170246105 Subjects--Topical Terms: costPlants Dewey Class. No.: 333.8232 / VAC 1995