00461nam a22001457a 4500 230403b |||||||| |||| 00| 0 eng d National Science Library National Science Library 061.3:374.2 J7 Zelko, Harold P 3224 Successful conference and discussion techniques London: McGraw-Hill Book Company, Inc., 1957 xiii, 264p. American scheme udc BK 18041 18041 0 0 udc 0 06133742_J7 0 26797 NSL NSL GF/Rk-4/C-23/R-2 2023-06-25 0 061.3:374.2 J7 184256 2023-04-03 00:00:00 2004-06-25 BK