found: Ruysch, Frederik. Responsio, ad dissertationem epistolicam ... Jo. Christoph. Bohlii ... quam de usu novarum cavae propaginum in systemate chylopaeo, nec non de cortice cerebri, conscripsit ... 1727:(copper plate Illustration on verso of p. 12 is signed: Anna Folkema, fecit.)
found: OCLC database, December 28, 2006(hdg.: Folkema, A. ; usage: A. Folkema, caricatures by Joost van Sasse, Anna Folkema and others)
found: Dictionary of painters of miniatures, 1525-1850, c. 1926(Folkema, Anna. --Sister of Jakob Folkema. Painted miniatures and engraved some few plates about 1715. )
found: Allgemeines Künstlerlexikon, 2004v. 42 (Folkema, Anna, niederl. Miniaturmalerin, Zeichnerin, Graphikerin, * 22.5.1695 Dokkuen, [died] 1.10. 1768 Amsterdam. Tochter und Schuelerin von Johannes Jacobsz. F. Schwester von Fopje und Jacob F. [etc.])
found: Benezit. Dictionary of Artists, 2006(Folkema, Anna. Dutch, 18th century. Born 1695; died 1768, in Amsterdam. Miniaturist, engraver. Anna Folkema collaborated with her brother, the engraver Jakob Folkema, in Dokkum.)
notfound: ULAN
