https://books.google.de/books?id=DTOaBQAAQBAJ&pg=PA126&lpg=PA126&dq=%22Adolf+Weidenbach%22+Heidelberg&source=bl&ots=kE6UWEDHLX&sig=svB5KkzT4z8h-9Ia64fHSSzLFSU&hl=de&sa=X&ved=0ahUKEwih4Y7popnaAhXKb1AKHYrJBSoQ6AEILjAB#v=onepage&q=%22Adolf%20Weidenbach%22%20Heidelberg&f=false