"Botanical Writings, 1840-61". Miscellaneous Writings: Volume 31, Toronto: University of Toronto Press, 1989, pp. 255-320. https://doi.org/10.3138/9781442623330-003
(1989). Botanical Writings, 1840-61. In Miscellaneous Writings: Volume 31 (pp. 255-320). Toronto: University of Toronto Press. https://doi.org/10.3138/9781442623330-003