Problems of Post-Communism was created in 1954.
Nobody's Problems was created in 1971.
Welfare Problems was created in 2003.
Luxury Problems was created in 2005.
Good Problems was created in 2007.
The Problems of Philosophy was created in 1912.
Inverse Problems was created in 1985.
The Thirteen Problems was created in 1932-06.
Behavioral Problems was created on 2009-04-21.
Dog Problems was created on 2006-05-19.
Little Problems was created on 1989-02-12.
Social Problems - journal - was created in 1953.
The Study of the Negro Problems was created in 1898.