Statements (9)
| Predicate | Object | 
|---|---|
| gptkbp:instanceOf | gptkb:book | 
| gptkbp:author | Charles R. Gibson | 
| gptkbp:genre | popular science | 
| gptkbp:language | English | 
| gptkbp:publicationYear | 1914 | 
| gptkbp:publisher | gptkb:Seeley,_Service_&_Co. | 
| gptkbp:bfsParent | gptkb:C._R._Alder_Wright | 
| gptkbp:bfsLayer | 7 | 
| https://www.w3.org/2000/01/rdf-schema#label | The Threshold of Science |