@prefix ct: . @prefix rdaGr3: . @prefix gn: . @prefix wgs84_pos: . @prefix rdf: . @prefix edm: . @prefix owl: . @prefix foaf: . @prefix rdaGr2: . @prefix rdaRelGr2: . @prefix xsd: . @prefix gnd: . @prefix skos: . @prefix rel: . rdaGr2:nameOfThePerson "Porterfield, William"; gnd:publicationOfThePerson "Porterfield, William: A treatise on the eye, the manner and phaenomena of vision", "Porterfield, William: A treatise on the eye, the manner and phaenomena of vision. - 1759", "T060564: his A treatise on the eye, 1759 tp=By William Porterfield, M.D."; skos:note "PND-Grundbestand"@de; owl:sameAs , , gnd:100550797; rdf:type .