Progressive Learning Procedure Chart for School Swimming in David A. Armbruster, Robert H. Allen, and Hobert Sherwood Billingsley, Swimming and Diving, Fifth Edition, C. V. Mosby Co., 1968, via @eldiagram.bsky.social thediagram.com/26_3/allstro...
i work across nyc’s libraries and archives; i was a full professor of media studies, art history + anthropology architecture, archives, 🎨, cities, 🐕, infrastructure, libraries, 🗺️, sound++ nyc + upstate wordsinspace.net/work