อ้างอิง ของ สนร่ม

  1. ↑
  2. ↑ James Herbert Veitch (2006). Hortus Veitchii (reprint ed.). Caradoc Doy. pp. 51–52. ISBN 0-9553515-0-2.
  3. ↑ Wolfe, A. P.; Tappert, R.; Muehlenbachs, K.; Boudreau, M.; McKellar, R. C.; Basinger, J. F.; Garrett, A. (2009). "A New Proposal Concerning the Botanical Origin of Baltic Amber". Proceedings of the Royal Society B. 276 (1672): 3403–3412. doi:10.1098/rspb.2009.0806. PMC 2817186. PMID 19570786.
  4. ↑ Weitschat, W.; Wichard, W. (2010). "Chapter 6: Baltic amber". ใน Penney, D. (บ.ก.). Biodiversity of Fossils in Amber from the Major World Deposits. Siri Scientific Press. pp. 80–115. ISBN 978-0-9558636-4-6.

แหล่งที่มา

WikiPedia: สนร่ม http://blogs.ubc.ca/conifersubc/?page_id=66 http://www.alpine-plants-jp.com/himitunohanazono/k... http://www.alpine-plants-jp.com/himitunohanazono/k... http://www.alpine-plants-jp.com/himitunohanazono/k... http://oregonstate.edu/dept/ldplants/scve1.htm //pubmed.ncbi.nlm.nih.gov/19570786 //www.ncbi.nlm.nih.gov/pmc/articles/PMC2817186 http://www.conifers.org/sc/sc/index.htm //doi.org/10.1098%2Frspb.2009.0806 http://www.pinetum.org/cones/SCcones.htm