@book{13054,
	author = {Seminar Lectures on Differential Geometry in the Large, New York Univ., 1946 and Stanford Univ., 1956 and Hopf, Heinz},
	title = {Differential geometry in the large; seminar lectures by Heinz Hopf with a preface by S. S. Chern},
	publisher = {Springer-Verlag},
	year = {1983},
	address = {Berlin}
}