Winternitz, M. C. (Milton C.). “Fig. 7: Section of Lung Showing Exudate in a Bronchus. Fig. 8: Section of Lung Showing Small Focus of Broncho-Pneumonia in an Animal Surviving 2 Months after Exposure to Cyanogen Bromide.” Collected Studies on the Pathology of War Gas Poisoning. New Haven, Connecticut: Yale University Press, 1920. https://digital.sciencehistory.org/works/dr26xx51p.