Registration of mailing list brokers with the Postmaster General.
Subtitle: Hearing, Ninetieth Congress, first session, on H. R. 2382 ...
By: April 18, 1967. 
Publisher: U.S. Govt. Print. Off.
Published: 1967
Place of publication: Washington
Language: eng
Number of pages: 38
Subjects: Mailing lists -- United States