@book{12497,
	author = {Hartshorne, Robin.},
	title = {Companion to euclid; a course of geometry, based on euclid's elements and its modern descendants},
	publisher = {American Mathematical Society},
	year = {1997},
	series = {Berkeley Mathematics, lecture notes},
	address = {Providence},
	note = {"Purchased under NBHM grant for the year 1997-98"}
}