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008 000220s1967 xxk 00 eng
039 9 _y02-21-2000
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090 _aLC5915.E7
090 _aLC5915
100 1 _aErdos, Rene F.
245 1 0 _aTeaching by correspondence /
_cRene F. Erdos
260 _aLondon :
_bLongmans, Green & Co.,
_c1967
300 _a218 p. ;
_c20 cm.
440 _aUnesco source book
650 _aCorrespondence schools and courses
907 _a.b1264917x
_b2021-05-28
_c2019-11-12
942 _c01
_n0
_kLC5915.E7
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998 _at
_b2000-08-02
_cm
_da
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999 _c265719
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