Bose was nominated by K. Banerjee (1956), D.S. Kothari (1959), S.N. Bagchi (1962), and A.K. Dutta (1962) for the Nobel Prize in Physics, for his contribution to Bose–Einstein statistics and the unified field theory. Banerjee, head of the Physics Department, University of Allahabad, in a letter of 12 January 1956 wrote to the Nobel Committee as follows: "(1). He (Bose) made very outstanding contributions to physics by developing the statistics known after his name as Bose statistics. In recent years this statistics is found to be of profound importance in the classifications of fundamental particles and has contributed immensely to the development of nuclear physics. (2). During the period from 1953 to date, he has made a number of highly interesting contributions of far-reaching consequences on the subject of Einstein's Unitary Field Theory." Bose's work was evaluated by an expert of the Nobel Committee, Oskar Klein, who deemed his work not worthy of a Nobel Prize.