RT Book T1 Our knowledge of the external world as a field for scientific method in philosophy A1 Russell, Bertrand 1872-1970 LA English PP Chicago etc. PB Open court Pub. Co YR 1915 UL https://ixtheo.de/Record/1461116457 NO Delivered as Lowell lectures in Boston, in March and April 1914 CN B1649.R93 K1 Philosophy