000 00320nam a2200121Ia 4500
008 211209s1977 xx 000 0 und d
041 _aeng
082 _aINT
100 _aINTERNATIONAL LABOUR OFFICE
245 _aINTRODUCTION TO WORK STUDY
260 _aGENEVA
_bINTERNATIONAL LABOUR ORGANIZATION
_c1977
300 _a456
999 _c20830
_d20830