References

For Ginkgo

Crane, P. 2013. Ginkgo. Yale Univ. Press, New Haven, CT. 384 pp. Google Scholar

Page. 1990. In Kramer, K.U., and P.S. Green. 1990. Pteridophytes and Gymnosperms. In K. Kubitzki, ed., The families and genera of vascular plants. Springer-Verlag, Berlin. Google Scholar

Whetstone, R.D. 1993. Ginkgoaceae In Flora of North America Editorial Committee. 1993b. Flora of North America north of Mexico. Volume 2, pteridophytes and gymnosperms. Oxford Univ. Press, New York, NY. 475 pp. Google Scholar