Helsham, Richard, ca. 1682-1738 |
A course of lectures in natural philosophy [Microform] / by Richard Helsham ; published by Bryan Robinson |
London : Printed for J. Nourse, 1739. |
Helsham, Richard, ca. 1682-1738 |
Lectures in natural philosophy / by the late Richard Helsham ; published by Bryan Robinson |
Dublin : Physics department of Trinity college, [2000] |