00302nam a2200109Ia 4500082001900000100001900019245009800038260000900136300001400145490002800159500000500187  a330.183 B315b  aBasmann, R. L.  aGeneralized classical methods of linear estimation of coefficients in a structural equationb  c1957  app. 77-83  aEconometrica, Jan. 1957  a