Author: Waddington, C. H.
Publisher:George Allen and Unwin Ltd., Bombay
Copyright:1960
Author: Gupta, Subrata
Publisher:Moulik Library, Calcutta
Copyright:1960
Author: Majumdar, R. C. Pusalker, A. D. Majumdar, A. K.
Publisher:Bharatiya Vidya Bhavan, Bombay
Copyright:1960
Author: Willard Van Orman Quine
Publisher:The Technology Press of the Massachussetts Institute of Technology and John Wiley & Sons, Inc., New York and London
Copyright:1960