00301nam a2200109Ia 4500082002300000100001800023245007700041260004800118300001500166500000500181700000500186  a519.50183bF514.PA  aFinney, D. J.  aProbit analysis; a statistical treatment of the Sigmoid response curveb  aCambridgebCambridge University Pressc1964  axiv, 318p.  a  a