found: Washington post WWW site, viewed May 5, 2021(in obituary dated May 4, 2021: Helen Murray Free; decades-long career as a chemist at Miles Laboratories in Indiana, where, with her husband, Alfred Free, she developed a dip-and-read glucose test in 1956 that revolutionized diabetes care. Mrs. Free died May 1 in Elkhart, Ind. She was 98. When Mrs. Free joined Miles Laboratories shortly after her college graduation, the company, which was later acquired by Bayer, was best known for its effervescent antacid Alka-Seltzer. Helen Mae Murray was born in Pittsburgh on Feb. 20, 1923. She received a bachelor's degree in chemistry from the College of Wooster in 1944. Decades later, she resumed her university studies and received a master's degree in health-care management from Central Michigan University in 1978. Mrs. Free retired in 1982, having risen to positions including director of marketing services, but continued working for Bayer as a consultant)