00630nam a2200157Ia 4500008004100000010001200041020001800053040001700071082002400088100002000112245009400132260004100226300001700267440007000284650011800354190328s9999||||xx |||||||||||||| ||und||  a84-6192  a0-04-312020-2  aNITILcNITIL  221sta300.72bH477I  aHellevik, Ottar 0aIntroduction to causal analysisbexploring survey data by crosstabulationcOttar Hellevik  aLondonbGeorge Allen and Unwinc1984  axxiii, 211p.  aContemporary social science research sries/ed by Martin Bulmer; 9  aSocial sciences-Research-Addresses, essays, lectures; Social surveys-Addresses, essays, lectures; Social problems