Применение перфокарт в поисковых фондах для создания специальных картотек по патентным вопросам
Technical data
URL: http://www.digar.ee/id/nlib-digar:380768
ViewAvailable at the authorised workplace in the National Library of Estonia, Archival Library of the Estonian Literary Museum, Tallinn University of Technology Library, University of Tartu Library and Academic Library of Tallinn University
Available in the network of the National Library of Estonia
Access restricted in public network
URL: http://www.digar.ee/id/nlib-digar:380768
