Tillyer, Edgar D. |
Axial aberrations of lenses / by E.D. Tillyer and H.I. Shultz |
Washington : Government printing office, 1917. |
Tillyer, Edgar D. |
The clock vault of the U.S. Naval observatory / Edgar D. Tillyer |
[S.l. : s.n., 1908?] |
Tillyer, Edgar D. |
Determination of the zonal variation of the equivalent focus / E.D. Tillyer |
[S.l. : s.n., 1913?] |