Who is the author of /musictheory?

The author of the book '/musictheory'is John Doe. and this book published in 1940

What is the Publish date of /musictheory?

'/musictheory' was published in 1940.

The name of the publisher is 270.

Yes Offcourse this book have pdf version , not only its have many version/musictheory.

You Can find this book /musictheory, at book.pdfforest and it's totally free, no need to pay.