Plummer, Christopher (Autor Personal)

MacLeish, A. J.B. [Phonodisc] 1959.

Rodgers and Hammerstein's The sound of music [VR] 2000, c1965: opening credits, cast (Christopher Plummer)

Variety's ww in show business, 1989 (Plummer, Christopher; b. Dec. 13, 1929, Toronto; actor)

Wikipedia, April 04, 2014 (Arthur Christopher Orme Plummer CC; born December 13, 1929 in Toronto is a Canadian theatre, film and television actor. He made his film debut in 1958's Stage Struck, and notable film performances include The Sound of Music , The Night of the Generals, Murder by Decree, The Return of the Pink Panther, etc. His daughter is actress Amanda Plummer)

IMDb, October 12, 2020: (Christopher Plummer; actor, soundtrack, producer)

New York Times, obituary dated and viewed February 5, 2021: (Christopher Plummer, Canadian-born actor, died Friday [February 5] at his home in Weston, Conn. He was 91).