Harmondsworth: Penguin Books, 1969

Walter de Gruyter GmbH, 1985

Informa UK Limited, 1973

SAGE Publications, 1967

Center for Research on Conflict Resolution, University of Michigan, 1967

SAGE Publications, 1967

SAGE Publications, 1963

Center for Research on Conflict Resolution, University of Michigan, 1963

SAGE Publications, 1956

Informa UK Limited, 1958

Det Kgl. Bibliotek/Royal Danish Library, 1954

Det Kgl. Bibliotek/Royal Danish Library, 1951

University of Chicago Press, 1952

University of Chicago Press, 1952

SAGE Publications, 1991

Oxford University Press (OUP), 1985

SAGE Publications, 1984

SAGE Publications, 1971

JSTOR, 1969

SAGE Publications, 1966