00346nam a2200121Ia 4500008004100000020001800041040003800059100001300097245003700110260004500147300001700192653001500209211217s9999    xx            000 0 und d  a0 471 45419 2  cJayakar Knowledge Resource Centre  aKagan, J 0aChange and continuity in infancy  bJohn Wiely and Sons, IncaNew Yorkc1971  axiii, 298 p.  aPsychology