{"source":"book","style":"apa","contributors": [{"function":"author","last":"Playfair","first":"John"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Elements of geometry, containing the first six books of Euclid, with a supplement of the quadrature of the circle and the geometry of solids.","publisher":"Printed for F. Nichols, by Thomas and George Palmer","city":"Philadelphia","year":"1806"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"1966618"}