http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
4 maps ; 23 x 38 cm, on sheets 29 x 46 cm, folded in cover 29 x 23 cm + 1 text (3 pages ; 29 x 46 cm)
Maps at scales 1:24,000 or larger -- Maps from scale 1:24,000 through 1:63,360 -- Maps from scale 1:63,360 through 1:250,000 (2 sheets).
compiled by Willard L. McIntosh and Margaret F. Eister, 1981.
Cover includes explanatory text with a list of codes specifying U.S. Geological Survey depository library locations.
The bibliography serves as an index to specific maps keyed to each index map, "The map areas on this index are keyed to one or more bibliographic citations."
"U.S. Government Printing Office: 1981 -- 361-614/256."
Bibliography on leaves 5-7 includes 392 items.