The theorem of Thomson and Tait and natural families of trajectories
Edward
Kasner
121-140
The introduction of ideal elements and a new definition of projective $n$-space
Frederick William
Owens
141-171
The group of classes of congruent quadratic integers with respect to a composite ideal modulus
Arthur
Ranum
172-198
A simplified treatment of the regular singular point
George D.
Birkhoff
199-202
The strain of a gravitating, compressible elastic sphere
L. M.
Hoskins
203-248