His La potion magique, c1980 t.p. (Louis Leprince-Ringuet) cover (L. Leprince-Ringuet)
The New York times, Dec. 28, 2000 obituaries (Louis Leprince-Ringuet; French nuclear physicist; b. in Alè€s, France; d. Dec. 23, 2000 in Paris at age 99, three months before his 100th birthday)