Try these sources:
World press encyclopedia online edition and earlier edition at: PN4735 .W6 1982
Annotations : a guide to the independent critical press
PN4784.U53A557x 1999
From radical left to extreme right : a bibliography of current periodicals of protest, controversy, advocacy, or dissent, with dispassionate content-summaries...
1st ed. 016.051M958f 1967 (storage)
2nd ed. Z7165.U5M82
3rd ed. JK1726.S441 1987