Oproot Research: Photography
Image ID: 02042016
Picture Description: punch cards
Copyright © Oproot Research. All rights reserved.
Permission is granted for limited, non-commercial use of these images. If used, please credit and notify Oproot Research. If circumstances permit, please include the URL: http://oproot.com. Oproot Research would appreciate a copy of publication. High-resolution images are also available. Image usage may or may not be free. Please email questions, requests, comments to email@example.com.