Text on back: 'Visit in Heidelberg from congress at Mannheim (May 25-28) 1927...'; in the middle: Rocker.
Chicago Style (17th ed.) CitationText on Back: 'Visit in Heidelberg from Congress at Mannheim (May 25-28) 1927...'; in the Middle: Rocker.
MLA (8th ed.) CitationText on Back: 'Visit in Heidelberg from Congress at Mannheim (May 25-28) 1927...'; in the Middle: Rocker.
Warning: These citations may not always be 100% accurate.