Fries K., Fink-Straube C., Mennig M., Schmidt H. (2004) Photochromic Coatings. In: Aegerter M.A., Mennig M. (eds) Sol-Gel Technologies for Glass Producers and Users. Springer, Boston, MA. DOI https://doi.org/10.1007/978-0-387-88953-5_33; Publisher Name Springer, Boston, MA; Print ISBN 978-1-4419-5455-8; Online ISBN 978-0-387-88953-5
Welaka, FL. Welaka is located close to the center of Florida. Welaka is part of Putnam County. Welaka has 1.48 square miles of land area and 0.03 square miles of water area. As of 2010-2014, the total Welaka population is 752, which has grown 28.33% since 2000.
Polk County is located in the State of Florida. The county population was 602,095, as of the 2010 census. Its county seat is Bartow, and its largest city is Lakeland. Polk County is part of the greater Tampa Bay Area. Polk County comprises the Lakeland-Winter Haven Metropolitan Statistical Area. This MSA is the 87th most populous metropolitan statistical area and the 89th most populous primary statistical area of the United States as of July 1, 2012.