Changes

* ''Frommer's Denver, Boulder & Colorado Springs'' (2009) [http://www.amazon.com/Frommers-Boulder-Colorado-Springs-Complete/dp/0470382287/ref=sr_1_2?ie=UTF8&s=books&qid=1245293145&sr=1-2 excerpt and text search]

* ''Frommer's Denver, Boulder & Colorado Springs'' (2009) [http://www.amazon.com/Frommers-Boulder-Colorado-Springs-Complete/dp/0470382287/ref=sr_1_2?ie=UTF8&s=books&qid=1245293145&sr=1-2 excerpt and text search]

* Arrington, Leonard J., and John R. Alley,  Jr.  ''Harold F. Silver: Western Inventor, Businessman, and Civic Leader.'' 1992. 250 pp. In the 1930s-1960s Silver grew rich by inventing a portable sugar beet piler and a sugar diffuser that sharply lowered costs in the sugar industry; he was even more successful in inventing continuous process coal mining machinery.

* Arrington, Leonard J., and John R. Alley,  Jr.  ''Harold F. Silver: Western Inventor, Businessman, and Civic Leader.'' 1992. 250 pp. In the 1930s-1960s Silver grew rich by inventing a portable sugar beet piler and a sugar diffuser that sharply lowered costs in the sugar industry; he was even more successful in inventing continuous process coal mining machinery.

* Barth, Gunther Paul. ''Instant Cities: Urbanization and the Rise of San Francisco and Denver'' (1975) [http://books.google.com/books?id=0zYITx9wIO0C&dq=intitle:denver&num=30&as_brr=3 excerpt and text search]

* Barth, Gunther Paul. ''Instant Cities: Urbanization and the Rise of San Francisco and Denver'' (1975) [https://books.google.com/books?id=0zYITx9wIO0C&dq=intitle:denver&num=30&as_brr=3 excerpt and text search]

* Brosnan, Kathleen A. ''Uniting Mountain and Plain: Cities, Law, and Environmental Change along the Front Range'' (2002) says Denver modernized by laying waste to the environment in late 19th century  

* Brosnan, Kathleen A. ''Uniting Mountain and Plain: Cities, Law, and Environmental Change along the Front Range'' (2002) says Denver modernized by laying waste to the environment in late 19th century  

*  Brundage, David. ''The Making of Western Labor Radicalism: Denver's Organized Workers, 1878-1905'' (1994) [http://www.amazon.com/Making-Western-Labor-Radicalism-Organized/dp/0252020758/ref=sr_1_45/103-4827826-5463040?ie=UTF8&s=books&qid=1191471150&sr=8-45 excerpt and text search]

*  Brundage, David. ''The Making of Western Labor Radicalism: Denver's Organized Workers, 1878-1905'' (1994) [http://www.amazon.com/Making-Western-Labor-Radicalism-Organized/dp/0252020758/ref=sr_1_45/103-4827826-5463040?ie=UTF8&s=books&qid=1191471150&sr=8-45 excerpt and text search]