American Swim Coach Association:  http://www.swimmingcoach.org

College Swimming:  http://www.collegeswimming.com

Go Swim:  http://www.goswim.tv

Gulf Swimming:  http://www.gulfswimming.org 

Gulf Swimming, Outreach & Diversity:  https://www.gulfswimming.org/about-gulf-swimming/outreach-diversity-information/

The Race Club:  http://www.theraceclub.com

Swimming World Magazine:  http://www.swimmingworldmagazine.com

SwimSwam:  http://www.swimswam.com

Time Conversion Tools:  http://www.swimswam.com/swimming-times-conversion-tool/

US Masters Swimming:  http://www.usms.org

USA Swimming:  http://www.usaswimming.org

USA Swimming SWIMS Times Database:  http://www.usaswimming.org/Home/times/individual-times-search