Here are some tips for finding maps in Google searches:
To find government issued maps use extension site:gov
To find maps from U.S. colleges or universities, use extension site:edu
To find maps from international agencies (UN, NATO, etc) type in site:int
To find maps from non-profit organizations (museums, associations, private institutes) enter site:org
To find maps coming from websites in other nations, enter two letter country code extension (Russia is site:ru)
Examples:
[U.S. academic sites containing maps and CSULB]