The ISBN system was devised beginning in 1967, and books published prior to then don't have "editions" associated with them. It's very similar with movie, music and video game UPCs. It's also possible that a seller listed an item with us and didn't include an ISBN/UPC with the listing. You'll find items like this by clicking this link.
Reviews of Ad Dekkers : [tentoonstelling : Stedelijk Museum, Amsterdam, 4.12.1981-17.1.1982, Staatliche Kunsthalle, Baden-Baden, 29.1.1982-14.3.1982, Maison de la culture, Châlon-sur-Saône, 10.4.1982-23.5.1982
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