00557     2200217   4500001002100000005001500021007000300036008004100039020001800080035002000098082001100118084001700129100001700146245006500163250000600228260003200234300003000266650002500296990000900321990000900330INLIS00000000000265820210619010341ta210619                g          u ind    a979-683-851-6  a0010-0621000993  a370.15  a370.15 ROY l0 aROY ANDERSON1 aLangkah Pertama Membuat Siswa Berkonsentrasi /cROY ANDERSON  a1  aJakarta :bPT Indeks,c2008  a137 hlm :bilus. ;c21 cm  aPsikologi Pendidikan  a3198  a3199