00329nam a2200121Ia 4500008004100000040003800041100001500079245003600094250000600130260004500136300001100181653001500192211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aCofer, C N 0aMotivation: theory and research  a1  bJohn Wiely and Sons, IncaNew Yorkc1964  a960 p.  aPsychology