USA :road-trips planning : guide to national parks

 Walker, Benedict;

Carlton, Victoria : Lonely Planet Publications , 2018

Hallowed ground :a walk at Gettysburg

 McPherson, James M.;

New York : Crown Journeys , 2003

The Rough guide to USA

 Cook, Samantha Cook; Dickey, JD; Edwards, Nick; Ward, Greg; Perry, Tim;

Princeton, New Jersey : Rough Guide , 2007

Great Lakes 2003

 illinois,indiana,michigan;

Illinois : Exxon Mobil Travel Publications , 2002

The national parks of America

 Brett, Michael;

Hauppauge, NY : : Barron's Educational Series , 2001

The Rough guide to USA

 Cook, Samantha Cook; Dickey, JD; Edwards, Nick; Ward, Greg;

Westport, Connecticut : Greenwood Press , 2009

An American idea : the making of the national parks

 Heacox, Kim;

Washington : National Geographic Society, , 2009

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