1.

図書
図書
1. Forest protection
by Ralph C. Hawley
出版情報: New York : John Wiley , London : Chapman & Hall, 1937
所蔵情報: 図書館
2.

図書
図書
2. The practice of silviculture : with particular reference to its application in the United States
by Ralph C. Hawley
出版情報: New York : Wiley, 1921
所蔵情報: 図書館
3.

図書
図書
3. Manual of forestry for the northeastern united states : being vol. 1 of "forestry in new england" revised. 2nd ed
by Ralph Chipman Hawley and Austin Foster Hawes
出版情報: New York : J. Wiley, 1918
所蔵情報: 図書館