Practical mathematics : summary of six lectures delivered to working men / by John Perry at the Museum of Practical Geology, Jermyn Street, February and March, 1899; with certain exercises supposed to be worked after every lecture.
Practical mathematics : summary of six lectures delivered to working men / by John Perry at the Museum of Practical Geology, Jermyn Street, February and March, 1899; with certain exercises supposed to be worked after every lecture.