Ulrich's international periodicals directory 1992-1993 : volume 1
R.R. Bowker, 1992
Buku Referensi
Ulrich's international periodicals directory 1990-1991 : volume 1
R. R. Bowker Company, 1990
Buku Referensi
Encyclopedia of associations : international organizations 1991, part 1
Linda Irvin, editor
Gale Research, 1991
Buku Referensi
Directories in print 1991 : part 1
Gale Research, 1991
Buku Referensi
Direktori pesantren : 1
Perhimpunan Pengembangan Pesantren dan Masyarakat, 1986
Buku Referensi