"SSKB:
SSKB2:155 identifies three columns of a Si ji shuyu (Letter writin Protocol of the Four Seasons) and transcribes two columns of a text noting an exchange for wheat made by a resident of Mogao township named Fan Shunzi, on sixth day of fifth month of a gengxu year, the equivalent of which is thought to be either 890 or 950 (see R.1)."
(JB)