Kalm, Pehr (1772). Travels into North America: containing its natural history, and a circumstantial account of its plantations and agriculture in general, with the civil, ecclesiastical and commercial state of the country, the manners of the inhabitants, and several curious and important remarks on various subjects. Translated by Johann Reinhold Forster. London: T. Lowndes. pp. 48-49. ISBN9780665515002. OCLC1083889360.
Devine, Warren D.; Tyler, Donald D.; Mullen, Michael D.; Houston, Allan E.; Joslin, John D.; Hodges, Donald G.; Tolbert, Virginia R.; Walsh, Marie E. (May 2006). "Conversion from an American sycamore (Platanus occidentalis L.) biomass crop to a no-till corn (Zea mays L.) system: Crop yields and management implications". Soil and Tillage Research. 87 (1): 101–111. Bibcode:2006STilR..87..101D. doi:10.1016/j.still.2005.03.006.
Devine, Warren D.; Tyler, Donald D.; Mullen, Michael D.; Houston, Allan E.; Joslin, John D.; Hodges, Donald G.; Tolbert, Virginia R.; Walsh, Marie E. (May 2006). "Conversion from an American sycamore (Platanus occidentalis L.) biomass crop to a no-till corn (Zea mays L.) system: Crop yields and management implications". Soil and Tillage Research. 87 (1): 101–111. Bibcode:2006STilR..87..101D. doi:10.1016/j.still.2005.03.006.
Sullivan, Janet (1994). "Platanus occidentalis". Fire Effects Information System (FEIS). US Department of Agriculture (USDA), Forest Service (USFS), Rocky Mountain Research Station, Fire Sciences Laboratory.
Wells, O.O.; Schmidtling, R.C. "Sycamore". srs.fs.usda.gov. United States Department of Agriculture. Retrieved 9 December 2022.
worldcat.org
search.worldcat.org
Kalm, Pehr (1772). Travels into North America: containing its natural history, and a circumstantial account of its plantations and agriculture in general, with the civil, ecclesiastical and commercial state of the country, the manners of the inhabitants, and several curious and important remarks on various subjects. Translated by Johann Reinhold Forster. London: T. Lowndes. pp. 48-49. ISBN9780665515002. OCLC1083889360.