Berlin: Verl. Volk und Welt, 1974

Johns Hopkins University Press, 2009

Project MUSE, 2009

JSTOR, 1971

JSTOR, 1969

JSTOR, 1970

JSTOR, 1992

JSTOR, 1988

JSTOR, 1986

Hofstra University Press, 1986

JSTOR, 1985

JSTOR, 1984

JSTOR, 1982

JSTOR, 1977

JSTOR, 1992

JSTOR, 1994

JSTOR, 1985

JSTOR, 1969

JSTOR, 1972