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<http://webisa.webdatacommons.org/69309164>	<http://www.w3.org/ns/prov#value>	"Most are handwritten by Chappell, and discuss both men's latest writings and activities, including family trips and academic conferences." .
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<http://webisa.webdatacommons.org/69309164>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<duke.edu> .