This excerpt describes two visits by the authors to Dr. McCleery's wolf park, probably in the 1940s.
Use WorldCat to find a library near you that owns this item. If no library near you owns the item, your local library may be able to borrow it for you via interlibrary loan: http://www.worldcat.org/oclc/2488045
The book contains the copyright statement "Copyright, 1950, by Amy Oakley and Thornton Oakley." If the copyright was not renewed, then this work is currently in the public domain. If the copyright was renewed, copyright law as of 2013 states that this item will enter the public domain in 2045. The Penn State University Libraries list this item as in the public domain, so I am assuming that copyright was not renewed and that this book is therefore in the public domain.