X-rays / by B. L. Worsnop and F. C. Chalklin. Worsnop, B. L. (Bernard Lister), 1892- Chalklin, Francis Cecil, author. X-rays. QC481 .W83 1946 535.66 WOX Bibliography: p. 123. London : Methuen, c1946. c1946. 1946 Text vii, 126 p. : eng Methuen's monographs on physical subjects Methuen's monographs on physical subjects.