Cover title.
Distributed to depository libraries in microfiche.
Shipping list no.: 98-0088-M.
Chiefly tables.
"March 1997"--T.p. verso.
Includes index to tables.
Microfiche. [Washington, D.C.] : Supt. of Docs., U.S. G.P.O., 1997 3 microfiches : negative.