Mss.B.B61_W

Warburg, Max: From Boas. 1939 Nov. 20

Warburg, Max: From Boas. 1941 June 30

Warburg, Max: From Boas. 1942 Dec. 3

Warburg, Max: From Boas. 1942 July 28

Warburg, Max: From Boas. 1942 Nov. 2

Warburg, Max: From Boas. 1942 Sept. 14

Warburg, Max: To Boas. 1931 Aug. 7

Warburg, Max: To Boas. 1934 Jan. 3

Warburg, Max: To Boas. 1939 July 10

Warburg, Max: To Boas. 1939 July 11

Warburg, Max: To Boas. 1939 Nov. 21

Warburg, Max: To Boas. 1941 Dec. 24