X-ray crystallography 42 X-rays 28 Physics 25 Crystallography 16 X-ray spectroscopy 15 Biography 13 Diffraction 10 Cosmic rays 9 Criticism and interpretation 9 Satyajit Ray 9 Dissertations, Academic (Ph.D) 7 Thesis (Ph.D)-Physics 7 X-rays and gamma rays; Electronics; Physics 7 Arts 6 Chemistry 6 Cinema 5 Molecular ray 5 Motion picture producers and directors 5 Motion pictures 5 Satyajit Ray-Biography 5 Social Sciences 5 X-ray diffraction 5 X-rays--Diffraction 5 Biography Sathyjit Ray 4 Chemistry, Analytic 4 Cytology 4 Motion picture producers and directors-Biography 4 Raja Rammohan Roy English works 4 Religious Reform Raja Ram Mohan Roy 4 Social Reform Raja RamMohan Ray 4