There are 3 Calder catalogues published by the Stedelijk Museum ( 1947,1959 and 1969). 2 of them are available through www.ftn-books.com. The first 2 were designed by Willem Sandberg and the last one by Wim Crouwel. Many colelctors like the 1959 catalogue , this because of the bald design and great prints on the cover, but for me the 1949 is the best, much more subtle and a catalogue that shows the design path Sandberg is going to take. Choice of paper, typography and illustrations make this the perfect early Sandberg publication.