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020 _a92-3-101826-4
082 0 4 _a371.101
_bUNE
110 2 _aUNESCO.
245 0 2 _aA system approach to teaching and learning procedure :
_bA guide for educators /
_cUNESCO.
260 _aParis :
_bUNESCO,
_c1981.
300 _a203 p. :
_bill. ;
_c24 cm.
504 _aIncludes Bibliographical
650 0 _aTeaching strategies
650 0 _aSystem analysis
942 _cBK