Calvin Coolidge

http://www.biography.com/people/calvin-coolidge-9256384
http://www.buscabiografias.com/biografia/verDetalle/3675/Calvin%20Coolidge
http://www.mcnbiografias.com/app-bio/do/show?key=coolidge-john-calvin

http://www.google.com.pr/url?sa=t&rct=j&q=calvin%20coolidge%20biografia&source=video&cd=1&cad=rja&uact=8&ved=0CB8QtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DSqkr2nOdyB8&ei=DThCVdDCLYyyggTfrIDQCg&usg=AFQjCNG70HGU3uEmu1DQDtVAl6cgxIu_JQ&sig2=jz_AJab2HMLlli9krRY0kg
http://www.google.com.pr/url?sa=t&rct=j&q=calvin%20coolidge%20biografia&source=video&cd=2&cad=rja&uact=8&ved=0CCIQtwIwAQ&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D8SRecDQC7JI&ei=DThCVdDCLYyyggTfrIDQCg&usg=AFQjCNF5b_gXy0PxSdVZGt0e3Y0wXCypow&sig2=4pPAeKrAApqaHD98kePIGg