Tập Nhạc

In 1975, 1976 when first settling in the US Pham Duy wrote a set of 3 books to teach Guitar with many of his own songs and his own hand writings. I bought this set, but since then have lost all three books
I think it's a must to include that set in this collection along with the songs Pham Duy, Thai Hang and Thai Hien sang for this teaching material.
Thank you,
Tuan Tran