I believe it is out of print. [EDIT: According to Amazon it is still in print by SCM. Latest edition was 10/2011.]
I believe they have a newer edition of this. See
http://www.amazon.com/Anthropology-Testament-Hans-Walter-Wolff/dp/0334000211/ref=sr_1_2?s=books&ie=UTF8&qid=1363410650&sr=1-2
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