@book{39018,
	author = {Vaux, Norris Wistar, and Castallo, Mario Alberto,},
	title = {The mechanics of obstetrics,},
	publisher = {F. A. Davis,},
	year = {1948.},
	address = {Philadelphia,},
	note = {Earlier editions by Norris W. Vaux and Mario A. Castallo.}
}