"Neolithic Jades in the Collection of the National Palace Museum", Teng Seu-P'ing.
"Chinese Archaic Jades, from the Kwan Collection', Yang Boda.
"A Catalogue of the NAtional Palace Museum's Special Exhibition of Circular Jade".
"Chinese Jades", Ming Wilson.
"Jade", Roger Keverne.
Not thoroughly examined. Partly worn. Some creases.