Stephen A. Spongberg
…Spongberg, S. A. (1993). Notes on Transatlantic Migrants. Arnoldia, 53(2), 10–20. http://www.jstor.org/stable/42955169 Spongberg, S. A. (1993). Introducing Weigela subsessilis. Arnoldia, 53(4), 31–33. http://www.jstor.org/stable/44944882 Spongberg, S. A., & Del Tredici, P….