00263nam a2200109Ia 4500082002000000100001800020245005100038260004100089300001300130500000500143700000500148  a300.18bD564.PD  aDiesing, Paul  aPatterns of discovery in the social sciencesb  aLondonbRoutledge & Kegan Paulc1972  ax, 350p.  a  a