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Pham, M.T.N. 2018. BOOK REVIEW: Halma, R. & Oplinger, C. S. (2001). The Lehigh Valley: A Natural and Environmental History. University Park, PA: The Pennsylvania State University Press. 361 pages. ISBN: 0271020946. FIRE: Forum for International Research in Education. 4, 1 (Dec. 2018). DOI:https://doi.org/10.18275/fire201704011117.