About: http://webisa.webdatacommons.org/91738995

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	His textbook Calculus is used at about 100 U.S. colleges and universities and on every continent except Antarctica.
http://www.w3.org/ns/prov#wasQuotedFrom	roanoke.edu