When did Peter Hirsch work under an Australian-born British physicist and X-ray crystallographer?
William Lawrence Bragg: Sir William Lawrence Bragg (31 March 1890 – 1 July 1971) was an Australian-born British physicist and X-ray crystallographer, discoverer (1912) of Bragg's law of X-ray diffraction, which is basic for the determination of crystal structure.
i don't know