000			00367nam a2200145Ia 4500
005			20250829161407.0
082			_a300.72 _bBLO
245			_aBlock 5 Classification and measurement
260			_aMilton Keynes: _bThe Open University, _c1979.
300			_b164p.
500			_aPB
546			_aEng
650			_aSocial science-Research-Methodology _9103763
942			_cBK
999			_c38994 _d38994