Columbia subject headings:
Harvard subject headings:
Associations, institutions, etc.--Poland--Statistics.
Church membership--Poland--Statistics.
Religious institutions--Poland--Statistics.
Princeton subject headings:
Associations, institutions, etc.--Poland--Directories.
Associations, institutions, etc.--Poland--Statistics.
Directories.
Ethnic groups--Poland--Societies, etc.--Directories.
Ethnic groups--Poland--Societies, etc.--Statistics.
Religious institutions--Poland--Directories.
Religious institutions--Poland--Statistics.
Statistics.