Upphovsman
Blumer, Herbert, 1900-1987
1
Burgess, E. W. 1886-1966,
1
Faris, Ellsworth, 1874-1953,
1
Instytut Filozofii i Socjologii (Polska Akademia Nauk)
1
Sir Arthur Lewis Institute of Social and Economic Studies
1
Small, Albion Woodbury, 1854-1926,
1
University College of the West Indies (Mona, Jamaica). Institute of Social and Economic Research
1
University of Chicago
1
University of the West Indies (Mona, Jamaica). Institute of Social and Economic Research
1