George Corsan, Sr. - ISHOF

Developed YMCA swimming programs; Head instructor of the International and National YMCA's; originated mass method of swimming instruction.

Shedding Fresh Light on the History of the Butterfly Stroke (Chapter 2) - As If By Design

Happy 80th Birthday Lance Larson - Sub-Minute Butterfly Pioneer Who Triggered The Timepad - Swimming World News

Plunge for distance - Wikipedia

Happy 80th Birthday Lance Larson - Sub-Minute Butterfly Pioneer Who Triggered The Timepad - Swimming World News

International Swimming Hall of Fame – Wikipedia

Butterfly stroke - Wikipedia

George Corsan, Sr. - ISHOF

Shedding Fresh Light on the History of the Butterfly Stroke (Chapter 2) - As If By Design

IAHSFF 2012_Book - Flip eBook Pages 51-100

2019 Yearbook_1PDF Pages 1-50 - Flip PDF Download

Dave Armbruster - ISHOF

Butterfly stroke - Wikipedia

Sports (Part I) - As If By Design

Happy 80th Birthday Lance Larson - Sub-Minute Butterfly Pioneer Who Triggered The Timepad - Swimming World News