Photo credit: Google
Sweet Gum during autumn along Lower Ferry Road in Ewing, New Jersey
Geographic leaf cuticular and gross morphological variations in Liquidambar styraciflua L. and their possible relationship to environmental pollution
by Sharma G. K., Tyree J. (1973)
University of Tennessee, Martin, Tennessee, USA
G. K. Sharma
Jane Tyree
in Bot. Gaz. 134(3): 179-184