Hawkins, B., Henry, G., & Whittington, J. (1996). Frost hardiness of Thuja plicata and Pseudotsuga menziesii seedlings when nutrient supply varies with season. Canadian journal of forest research, 26(8), 1509-1513. https://doi.org/10.1139/x26-169
Chicago Style (17th ed.) CitationHawkins, B.J, G. Henry, and J. Whittington. "Frost Hardiness of Thuja Plicata and Pseudotsuga Menziesii Seedlings When Nutrient Supply Varies with Season." Canadian Journal of Forest Research 26, no. 8 (1996): 1509-1513. https://doi.org/10.1139/x26-169.
MLA (9th ed.) CitationHawkins, B.J, et al. "Frost Hardiness of Thuja Plicata and Pseudotsuga Menziesii Seedlings When Nutrient Supply Varies with Season." Canadian Journal of Forest Research, vol. 26, no. 8, 1996, pp. 1509-1513, https://doi.org/10.1139/x26-169.