produced by U.S. Fish and Wildlife Service.
Relief shown by spot heights.
Panel title.
Geographic coverage completes in 6 sheets.
Includes location diagram and index to terrestrial and aquatic organisms.
[NH-15-3]. Natchez, Mississippi-Louisiana -- [NI-15-2]. Jackson, Mississippi-Louisiana -- [NI-15-3]. Memphis, Tenn.-Ark.-Mo. -- [NI-15-6]. Helena, Ark.-Miss.-Tenn. -- [[NI-15-9]. Greenwood, Miss.-Ark.-La. -- [NI-16-1]. Blytheville, Ark.-Tenn.-Ala.-Mo.