"April 1991"--P. [4] of cover.
"OTA-SET-491"--P. [4] of cover.
CIS Microfiche Accession Numbers: CIS 91 J952-52
Reuse of record except for individual research requires license from LexisNexis Academic & Library Solutions.
Microfiche. [Bethesda, Md.] : LexisNexis Academic & Library Solutions, 1991. 11 X 15 cm.