TY - BOOK AU - Mwijage,E.F. AU - Shilingi,R.B. TI - Crystallographic groups T2 - MT 330: (Mathematics project) AV - MATH RES QD907.M85 PY - 1997/// CY - Dar es Salaam PB - University of Dar es Salaam KW - Crystallography KW - Algebra N1 - Includes bibliographical references ER -