This source refers to multiple editions of the same title; please be sure to specify which edition you are citing when using this source.
There is a 1952 Harvard University Press edition available from the Family History Library.
The 1961 edition is also available at the Family History Library. The 1961 edition of this book is revised and expanded (456 pages).
The revised third edition (University of Hawaii Press, 1989) is in print and can be purchased. A limited preview of the title is available on Google Books.