This guide lists information related to the history of tulips in Holland and the effects of COVID-19 on the Holland tulip/flower industry.
"Tulip Mania." Britannica Academic, Encyclopædia Britannica, 23 Feb. 2007. academic-eb-com.ezproxy.library.skagit.edu/levels/collegiate/article/Tulip-Mania/73725. Accessed 8 Oct. 2020.