1. “Management, machines and the bibliographic problems of the twentieth century,” in and (ed.), Bibliographic Organization (Univ. of Chicago Press, 1951).
2. “Machines and the bibliographical problems of the twentieth century,” in and , Bibliography in an Age of Science (Univ. of Illinois Press, 1951).
3. THE RAPID SELECTOR
4. With improvements in the machine, this may now be higher. On the other hand, it makes no allowance for changing reels.