Locations are on floors 2 and 5 for the Government Information Collection, based on the type of call number assigned.  

Second Floor:  Library of Congress call numbers (they look like this - K3830 .E58 2001)

Fifth Floor:  More LC numbers that begin with Z; Dewey Call numbers (they look like this  - 630.6 .I63); United Nations call numbers (they look like this - I-FAO/Un3 2:Ec7); Swank call numbers (they look like this - 17-I64HE 7:C976 1985/86);

Now on Fifth Floor:  Superintendent of Documents call numbers (they look like this - C 51.11:EN 8/) 

Please ask for help at the Service Desk if you would like additional assistance.