Notes on the Concave Grating and Its Application to Stellar Photography, by S. Alfred Mitchell, a Dissertation...
Parallaxes of 260 Stars, Derived from Photographs ... By S.A. Mitchell ... Assisted by C.P. Olivier, H.L. Alden and Others
Magnitudes and Coordinates of Comparison Stars for Fifty Long Period Variables, by S.A. Mitchell and C.A. Wirtanen