@book{10938,
	author = {Jeffreys, Harold, and Jeffreys, Bertha Swirles,},
	title = {Methods of mathematical physics,},
	publisher = {The University press,},
	year = {1946.},
	address = {Cambridge [Eng.]},
	note = {Includes most of Harold Jeffreys' "Operational methods in mathematical physics" and "Cartesian tensors." cf. Pref.}
}