. "This material has been digitised. Readers should book a reading room terminal to access it."@en . "Walter Wenzel was an employee at the cultural department of the city of Dortmund."@en . . . "5 letters"@en . "Correspondence regarding an affirmative newspaper article by Wenzel about Alfred Wiener, and the sending of books and bibliographic information."@en . . . "Correspondence with Wenzel, Walter"@en . . . "WL3000/9/1/1527" . . .