<http://webisa.webdatacommons.org/135037448>	<http://www.w3.org/ns/prov#value>	"This work is the most comprehensive source yet published on the subject and is an indispensable reference for the study of the Negro Leagues." .
<http://webisa.webdatacommons.org/prov/310727099>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/135037448> .
<http://webisa.webdatacommons.org/135037448>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/135037448>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<loc.gov> .