TY  - JOUR
T1  - The Theory of Symmetrical Optical Objectives
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 72
SP  - 267
EP  - 272
PY  - 1903/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1903.0051
M3  - doi:10.1098/rspl.1903.0051
AU  - Chalmers, S.
ER  -