00402nam a22001217a 4500008004100000040005500041080002000096100002000116245005300136260005300189300001700242653002100259230403b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a061.3:374.2bJ71 aZelko, Harold P  aSuccessful conference and discussion techniques   aLondon: bMcGraw-Hill Book Company, Inc., c1957  axiii, 264p.   aAmerican scheme