Zaidel, P. (2018). . Amherst Massachusetts: Environmental Conservation, University of Massachusetts Amherst. Retrieved from https://scholarworks.umass.edu/masters_theses_2/680/?utm_source=scholarworks.umass.edu\%2Fmasters_theses_2\%2F680\&utm_medium=PDF\&utm_campaign=PDFCoverPages (Original work published May 2018)