Methods of mathematical physics, by Harold Jeffreys ... and Bertha Swirles Jeffreys ... Jeffreys, Harold, Sir, 1891- Jeffreys, Bertha Swirles, joint author. Mathematics. Mathematical physics. QA401 .J4 530.15 19 JEM Includes most of Harold Jeffreys' "Operational methods in mathematical physics" and "Cartesian tensors." cf. Pref. Cambridge [Eng.] The University press, 1946. 1946. 1946 Text vii, 679 p. eng