I brought this book for the readers of English books. So, Dale E. Witmer wrote this book himself. Another thing is that you will not find this book anywhere on the internet as a pdf for free... on this blog. As far as I know, this book is the only one..so please recommend this blog to others as a help.. that's enough...if that is the case, I will also make a PDF list of the most difficult to find educational books....then the below Go to the link and download the PDF file.
