2 literature references for Pinus echinata Mill.:

Author: Bean, W.J.
Year: 1980
Title: Trees and shrubs hardy in the British Isles, ed. 8, Vols. 1-4
Source: John Murray, London
Author: Mill.
Year: 1768
Title:
Source: In: Gard. Dict., ed. 8: Pinus No. 12.