AUCTION CATALOGUES: FAYENCESAMMLUNG GEORG KITZINGER MÜNCHEN, manuscript annotations and prices, 7-9 May 1912, Hugo Helbing, München, 1912; FAYENCE-SAMMLUNG SANITÄTSRAT DR. G., FRANKFURT A.M. ..., 30 and 31 October 1917, Rudolf Bangel, Frankfurt, 1917; SAMMLUNG ULRICH SEILER, KÖLN, price list, 14 March 1973, Weinmüller, München, 1973 (3)