@book{bhlpg43484206, title = {The forest resources of Maryland }, volume = {no.61}, url = {https://www.biodiversitylibrary.org/page/43484206}, publisher = {Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station}, author = {United States. Forest Service. }, year = {1980}, pages = {Page 53}, } @book{bhlpg54450469, title = {Journal of the Botanical Research Institute of Texas }, volume = {v.7:no.1(2013)}, url = {https://www.biodiversitylibrary.org/page/54450469}, publisher = {Botanical Research Institute of Texas}, author = {Botanical Research Institute of Texas. }, year = {2013}, pages = {Page 548}, }