| Peter Keetman Wendelstein 1950 (taken) Gelatin silver print, ferrotyped 23.5 x 30.2 cm Bassenge Photography Auctions Auction (17 June 2009, Sale 93, Lot 4446) LL/32521 Signed, titled and dated by the photographer in pencil as well as photographer's/copyright stamp on the verso.
Rolf Sachsse/Manfred Heiting (eds.) Peter Keetman. Bewegung und Struktur. Amsterdam 1996, ill. P. 127.
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