In August 1980, the National Bureau of Standards (NBS) issued, in the form of oxalic acid, a new International Reference Material of contemporary carbon-14 for use in radiocarbon dating laboratories. This reference material was the replacement for the 1975 oxalic-acid standard, supplies of which had been practically exhausted in 1978. The preparation of the new oxalic-acid standard was described in a preliminary report, as were also the results then available for the activity-concentration ratio of the new to the old standard obtained by a number of leading international laboratories. The data have been compiled with no significant differences from the 1957 standard or from the provisional standard given in 1980. -- AATA