http://www.publictheater.org/Artists/Founder/Artist1111/
http://www.wnyc.org/story/142852-joseph-papp/
Books:
https://www.amazon.com/Free-All-Public-Greatest-Theater/dp/0767931696/ref=sr_1_1?ie=UTF8&qid=1473887910&sr=8-1&keywords=joseph+papp
https://www.amazon.com/Shakespeare-Alive-Americas-Foremost-Shakespeares/dp/0553270818/ref=sr_1_2?ie=UTF8&qid=1473887910&sr=8-2&keywords=joseph+papp
http://www.wnyc.org/story/142852-joseph-papp/
Books:
https://www.amazon.com/Free-All-Public-Greatest-Theater/dp/0767931696/ref=sr_1_1?ie=UTF8&qid=1473887910&sr=8-1&keywords=joseph+papp
https://www.amazon.com/Shakespeare-Alive-Americas-Foremost-Shakespeares/dp/0553270818/ref=sr_1_2?ie=UTF8&qid=1473887910&sr=8-2&keywords=joseph+papp