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Vaccinating trees
Publication: Purdue Agriculturist
Subject: Troop, James
Date: 3/1915
v. 9, no. 6 p. 40
Publication: Purdue Agriculturist
Subject: Troop, James
Date: 3/1915
v. 9, no. 6 p. 40
[sketch]
Publication: Debris
Subject: Troop, James
Date: 1915
p. 46
Publication: Debris
Subject: Troop, James
Date: 1915
p. 46
