2 literature references for Pinus pungens Lamb.:

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: Lamb.
Year: 1805
Title:
Source: In: Ann. Bot. (König & Sims) 2: 198.