Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 38
Prob. 43. Connector, Fig. 43. Scale, full size. … r/G. ^3Prob. 44. Connector, Fig. 44. Scale, full size.
Projection
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
