548 Bra C Bragg, William Lawrence, 1800-- The crystalline state. London, G. Bell,1962. 3 t. ilus. 23 cm Incliye bibliografía. Contiene: t. l. A general survey.- t. 2. The optical principales of the diffraction of x-rays by R.W. James.- t.3.The determination of crystal structures by H. Lipson and W. Cochran.------