Books by Z. Szilagyi:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Szilagyi, Z.: An x-ray telescope (National Aeronautics and Space Administration ;, 1965), also by R. Giacconi, R. F. Lacey, N. F. Harmon, Inc American Science and Engineering, and United States National Aeronautics and Space Administration (page images at HathiTrust)
Find more by Z. Szilagyi at your library, or elsewhere.