00891cam a22002531  45000010008000000030008000080050017000160080041000330100017000740350019000910400029001100420012001390500017001510820016001681000033001842450142002172600034003593000036003934900065004295040051004946500014005456500014005597000064005736405166BD-DhUL20160613093607.0760316s1930    nyua          001 0 eng    a   30011735   a(OCoLC)2052055  aDLCcTxAbHdDLCdBD-DhUL  apremarc00aLB1025b.W33  a370.78bWAR1 aWaples, Douglas,d1893-1978.10aResearch methods and teachers' problems :ba manual for systematic studies of classroom procedure /cby Douglas Waples and Ralph W. Tyler  aNew York :bMacmillan,c1930.  axxiii, 653 p. :bill. ;c21 cm.0 aHalf title: The modern teachers' series, ed. by W. C. Bagley  aIncludes bibliographical references and index. 0aTeaching. 0aResearch.1 aTyler, Ralph W.q(Ralph Winfred),d1902-1994ejoint author.