000 00528nam a22001932 4500
001 0000003175
005 20170406114817.0
008 140528s xx 000 0 eng d
020 _c$
040 _aYour Holding Symbol
_cYour Holding Symbol
100 1 _aLangford,Peter.
245 1 0 _aConcept development in the secondary schools.
250 _a ed.
260 _aNew york :
_bCroom Helm,
_c1987.
300 _a172 p. ;
_c cm.
504 _aindex.
650 0 _alearning psychology.
908 _a140528
999 _c3054
_d3054