What difficulties do socially maladjusted families cause in housing and what can be done about them? : prae-adviceThe property improved : the urban renewal activities of Purchased Property : 1982-1990OBASA training folder '82The purchase policy : the purchase and improvement of private rental housing with emphasis on the Amsterdam situationMaintenance: a right! [1982]Necessary evil with an ugly surprise : rotten beams during major maintenance Rijksmuseum of Antiquities