TY  - JOUR
T1  - On a Theory of the Second Order Longitudinal Spherical Aberration for a Symmetrical Optical System
JF  - Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Math. or Phys. Character (1896-1934)
VL  - 221
SP  - 29
EP  - 71
PY  - 1921/01/01/
UR  - http://dx.doi.org/10.1098/rsta.1921.0002
M3  - doi:10.1098/rsta.1921.0002
AU  - Baker, T.
AU  - Filon, L.
ER  -