- P. H. Ditchfield
-
The Romance of Mathematics Being the Original Researches of a Lady Professor of Girtham College in Polemical Science, with some Account of the Social Properties of a Conic; Equations to Brain Waves; Social Forces; and the Laws of Political Motion.
P. H. Ditchfield - P. H. Ditchfield
- P. H. Ditchfield
- P. H. Ditchfield
- P. H. Ditchfield
- P. H. Ditchfield