Books: 

Bogoras, W. “The Chukchee Material Culture”. Memoirs of the
    American Museum of Natural History Vol XI Part 1. New York: G.E.
   & Stechert Co, 1909.Farnham, A.B. Home Tanning and Leather Making Guide.  Columbus, OH: Harding Publishing,  1950. Order from Amazon.com

Lamb, M.C. Leather Dressing (including dyeing, staining & 
     finishing). London: The Leather Trades Publishing Co., 1909.

Wilder, Edna. Secrets of Eskimo Skin Sewing. Fairbanks AK: 
    University of Alaska Press,1976. Order from Amazon.com

Rahme, Lotta. Leather: Preparation and Tanning by Traditional
 Methods. Portland OR: The Caber Press, 1995. Translated from the
    Swedish by David Greenebaum.  Order from Amazon.com.

Odle, Mark. “Tools & Techniques of Bark Tanning“The Book of
    Buckskinning VII. Texarkana  TX: Scurlock Publishing Co, 1995.
Order from Amazon.com

Tulloch, Alice. Bark-Tan Babblings, an article in The Bulletin of
Primitive Technology.   Rexburg ID: The Society of Primitive
    Technology, 2000. Society website it at www.hollowtop.com. 

Reed, R. Ancient Skins, Parchments and Leathers. New York NY:
    Seminar Press, 1972.  This book is unfortunately out of print.