Catalogue of pneumatical, magnetical, and electrical instrumentsWillem Dirk Hackmann · First published 1995Open the Tome
Learning, language, and inventionFrancis Maddison, Willem Dirk Hackmann, Anthony John Turner · First published 1994Open the Tome
The evaluation of a museum communication formatWillem Dirk Hackmann · First published 1973Open the Tome
