21. Local government structure in the United States.   Publication: Washngton, D.C., Government Printing Office, 1954 . 91p. Date:1954 Availability: Copies available: Turkeyen Campus Social Sciences [JS323 Uni] (1), Actions: Add to cart No cover image available No cover image available
22. Ionospheric predictions.-   Publication: Washington, D.C. : U.S. Government Printing Office, 1971 . 3 vol.- Date:1971 Availability: Copies available: Turkeyen Campus Science & Technology [QC973.4 I6 U55] (2), Actions: Add to cart No cover image available No cover image available