@inbook{Crosby2008,
author = {Crosby, A.W.},
title= {Smallpox},
year = {2008},
doi = {10.1017/CHOL9780521332866.190},
editor = {Kiple, K.F.},
booktitle = {The Cambridge world history of human disease},
address = {Cambridge},
publisher = {Cambridge University Press},
pages = {1008--1013},
}