REF AI3.P82 Poole's Index to Periodical Literature, 1802-1881 . Peter Smith, 1938. English-language periodicals indexed by subject only. The IBZ is a current index, but is more often used for retrospective searches in American libraries. Also available on CD-ROM with coverage from 1989, but not here.
Periodical title identified by key numbers see numbered list of journals indexed.
Under different titles and with differences in coverage, the IBR goes back to 1900. Most academic libraries of any size subscribe. REF E172.98.M4 C45 Chicano Periodical Index , 1967-1978. G. K. Hall, 1981. Cumulation of early years of an index covering about 50 journals fully and 100 selectively, indexing materials on Mexican Americans and other Latino groups in the United States.