00357nam a2200121Ia 4500082002200000100004100022245003600063260003100099300002400130500004300154500000500197700003300202  a301.0723bH669.PS  aHirschi, Travis and Salvin, Hanan C.  aPrinciples of survey analysisb  aNew YorkbFree Pressc1973  axxviii, 280p. Index  aFormerly titled 'Delinquency Research'  a  aSalvin, Hanan C. ; jt. auth.