"Entered from booking ledger and New York Times concert listing and review.\r\n\"Who Makes Music and Where.\" New York Times (1923-), May 5 1968, p. D16. ProQuest. Web. 19 Dec. 2024.\r\nSherman, Robert. \"Van Putten, Baritone, Sings at Carnegie Recital Hall.\" New York Times (1923-), May 06 1968, p. 58. ProQuest. Web. 19 Dec. 2024." . . . . . "Hubert Van Putten, Baritone" . . . . . "solo recital" . . . . . "1968-05-05T17:30:00"^^ . .