On vaccination : its value and alleged dangers. A prize essay / by Edward Ballard.

Licence: Public Domain Mark

Credit: On vaccination : its value and alleged dangers. A prize essay / by Edward Ballard. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.