00535nam a2200133Ia 4500 260702b |||||||| |||| 00| 0 eng d 304.2 C748.ND Conference on "Man and his environment : a view towards survival", UNESCO, California, November 1969 / 23372 No deposit-no return ; anthology of papers presented at 13th national conference / Massachusetts Addison-Wesley 1970 xvi, 351p. Johnson, H. D. editor. 23373 ddc BK 0 0 0 304_200000000000000_C748_ND 0 52 ISI ISI 1998-05-25 0 304.2 C748.ND DP4515 2019-02-14 00:00:00 BK 39 39