De rustelooze aarde / R. GheyselinckDe rustelooze aarde / R. GheyselinckPermian trilobites from Timor and Sicily : with a revision of their nomenclature and classification / door Roger Fred.Charl.Ros. GheyselinckPermian trilobites from Timor and Sicily : with a revision of their nomenclature and classification / door Roger Fred.Charl.Ros. GheyselinckDe dood van taai geroddel : de snode verzinsels rond Ulenspiegel en De Coster / Roger GheyselinckDe rusteloze aarde / R. Gheyselinck