About: http://webisa.webdatacommons.org/148906802

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Closely allied to the newsletters as a way of reaching his public, are a series of letters to the editors he wrote, often in response to articles and other letters.
http://www.w3.org/ns/prov#wasQuotedFrom	uiowa.edu