@book{543931,
	author = {Kells, Lyman M. and Bland, James R.,},
	title = {Spherical trigonometry,},
	publisher = {McGraw-Hill book company, inc.,},
	year = {1942.},
	address = {New York,},
	edition = {1st ed.},
	note = {"Answers": p. 153-163.}
}