Columbia subject headings:
Harvard subject headings:
American newspapers--Bibliography--Periodicals.
Newspapers on microfilm--Bibliography--Periodicals.
Underground literature--Bibliography--Periodicals.
Underground press publications--Bibliography--Periodicals.
Princeton subject headings:
American newspapers--Bibliography--Periodicals.
Newspapers on microfilm--Bibliography--Periodicals.
Underground literature--Bibliography--Periodicals.
Underground press publications--Bibliography--Periodicals.