TY  - BOOK
ED  - Ayer, firm, newspaper advertising agents.
TI  - N. W. Ayer & Son's directory, newspapers and periodicals
CY  - Philadelphia.
KW  - American newspapers  Directories
KW  - American periodicals  Directories
KW  - Canadian newspapers  Directories
KW  - Canadian periodicals  Directories
N1  - Vols. for 1893-94 combined in one issue; Title varies: 1880-1929, N.W. Ayer & son's American newspaper annual and directory (varies slightly); Other slight variations in title; Absorbed Rowell's American newspaper directory in 1910 and assumed its numbering, 42d-  year
ER  -