Title in upper margin: Vegetation map of Maryland. "Map based on field data collected during 1973, 1974, and 1975." "Base map from Geologic Map of Maryland, Maryland Geological Survey, 1968." Includes ...
Topography and election districts by W. Carvel Hall ... [et al.]; Agricultural soils by W.G. Smith and J.O. Martin; geological formations by E.B. Mathews ... [et al.].
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