A book providing practical help to students at the graduate and postgraduate levels. What is given in the book is precise, clear and solid. The book's coverage and comprehensiveness, its scientific, analytical and critical treatment, its near perfect organization and arrangement, its clarity and easy methods of reference will make it a useful compendium for students and teachers. A teacher and lover of history the author has brought out philosophical, scientific, and ideological and linguistic perspectives to bear on the subject. Whether a student or teacher or a general reader, the manual can be expected to develop a healthy interest in history. The author has brought to bear philosophical, scientific, ideological and linguistic perspectives to bear on the subject.