"Different letters of Senger from 1933 that take issue with an article of Ursprung about the major of Zurzach and Senger. Senger accuses Ursprung of Intrigue. A letter of Leonhardt to Senger from February 1934 refering to that."@eng . "1 electronic resource (10 pages)"@eng . . "[Senger about Ursprung]"@eng . . . . "[Senger about Ursprung]"@eng . .