Columbia subject headings:
Hackert, Philipp, 1737-1807.
Merola, Stefano, active 18th century.
Papermaking--Italy--Naples (Kingdom)
Harvard subject headings:
Hackert, Philipp, 1737-1807.
Merola, Stefano, active 18th century.
Papermaking--Naples (Kingdom)
Princeton subject headings:
Hackert, Philipp, 1737-1807.
Papermaking--Italy--Naples (Kingdom).