Who is the author of Principal Upanishads?

The author of the book 'Principal Upanishads'is Sarvepalli Radhakrishnan. and this book published in 1940

What is the Publish date of Principal Upanishads?

'Principal Upanishads' was published in 1940.

The name of the publisher is 270.

Yes Offcourse this book have pdf version , not only its have many versionPrincipal Upanishads.

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

Title	Principal Upanishads
Creator	Sarvepalli Radhakrishnan
PPI	300
Mediatype	texts
Subject	Sarvepalli; upanishads; radhakrishnan ; vedanta;
Collection	opensource, community
Uploader	prashanthkesara
Identifier	PrincipalUpanishads