Alan McGowan: The BCM 1946, p307, has E. Mundsztuk.
Chess, October 1946, p4, gives E.C. Mundsztuk, Holland.
The Hastings and St Leonards Observer, Saturday, 28 December 1946, gave the entry list for Hastings, including E. Mundsztuk (Holland).
The Birmingham Daily Gazette, 1 January 1947, stated: The failure of two noted Hungarian players, R. Salley and E.C.H. Mundsztuk, to arrive at Hastings for the international chess tournament caused concern last night.
The Leipzig player's name has been shown as Mundsztuk, Mundstuck, Mundztuk, and Mundsztuck.
He played in the 1st and 2nd Jewish Chess Championships of Germany (1935 and 1937), but not in the 3rd at Hamburg 1938.
His first name has also been shown as Josef (Kaissiber 1/2001, p34).