Alemania. Bibliografía

(1985ca). THE JOHN R. BOKER, JR. COLLECTION OF GERMAN STATES. (complete collection of eighteen catalogues of the Kolher Auction, plus the presentation catalogue, in perfect state of conservation "as new"). Wiesbaden, 1985ca.

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(1985ca). THE JOHN R. BOKER, JR. COLLECTION OF GERMAN STATES. (complete collection of eighteen catalogs of the Kolher Auction, plus the presentation catalogue, in perfect state of conservation "as new"). Wiesbaden, 1985ca.