<http://webisa.webdatacommons.org/210073294>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/15156338>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/210073294> .
<http://webisa.webdatacommons.org/210073294>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nps.gov> .
<http://webisa.webdatacommons.org/210073294>	<http://www.w3.org/ns/prov#value>	"It may also be helpful to consult the extensive literature on sampling in such fields as human geography and archeology, examples of which are included in the bibliography." .
<http://webisa.webdatacommons.org/prov/472955036>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/210073294> .