i read the book >Guru Nanak wiaktatve kritatwa aur----. written by shri Rattan Singh Jaggi.in the year somewhere 1993 at the library of sri sees ganj gurudwara delhi.After some time say in around 1996 i tried to locate this book but i did not find.He had written this book as his pre doctorate work. This book was written for Magad university Bihar in Hindi . I never ever could forget that work of shri jaggi ----Jasbir singh grover Ph no--8285609530