Books by Merril T. Leffler:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Leffler, Merril T.: A compendium of aerobee sounding rocket launchings from 1959 through 1963 (National Aeronautics and Space Administration :, 1966), also by Jon R. Busse, United States National Aeronautics and Space Administration, and Goddard Space Flight Center (page images at HathiTrust)
Find more by Merril T. Leffler at your library, or elsewhere.