The fonds consists of two articles:
Use of a Computer for Calculating Cardiac Output (1965), by Stanley Sinclair, B.Sc., John H. Duff, M.D., Lloyd D. MacLean, M.D., Ph.D. Montreal. Reprinted from Surgery, St. Louis, Vol. 57, No. 3, pp. 414-418.

The Hyperbaric Chamber at the Royal Victoria Hospital, Montreal (1964), by John H. Duff, M.D., Walter D. Gundel, B.Mech.Eng., Henri G. Vignoul and Lloyd D. MacLean, M.D., Ph.D. Montreal. Reprinted from the Canadian Medical Association Journal, 91, 1051-1055.