About this Book
It is nearly thirty years since the first edition of this book was published. It gives the authors tremendous pleasure and satisfaction that even after three decades the book remains popular with students at undergraduate and postgraduate levels.
Inspite of such a long span the original format of the book is retained. The authors and the editor feel that the old fashioned format of the book is one of the main strengths of this ever popular book. The core structure of the book retains its original focus on the needs of our students, particularly in helping them during the preparation for their examinations.