By Sigmund, Paul E..
Cambridge, Mass Harvard Univ. Press 1963 .
viii, 335 p. port.

By Sigmund, Paul E..
Pittsburgh University of Pittsburgh Press 1977 .
xiii, 326 p. , 920306 25 cm..
0822933551. | 0822952874

By Sigmund, Paul E..
New York Praeger 1970 .
xiv, 338 p. , 920617

By Sigmund, Paul E..
New York Praeger 1972 .
viii, 483 p. , 920618 21 cm..

By Niebuhr, Reinhold.
London Pall Mall P. 1969 .
x, 192 p. , 920623 21 cm..
0269671129