Maryland Geological Survey :
[a series of reports dealing with the physical features of the various counties of Maryland].

APA Citation

Maryland Geological Survey. (1900). Maryland Geological Survey: [a series of reports dealing with the physical features of the various counties of Maryland]. Baltimore: Johns Hopkins Press.

MLA Citation

Maryland Geological Survey. Maryland Geological Survey: [a Series of Reports Dealing With the Physical Features of the Various Counties of Maryland]. Baltimore: Johns Hopkins Press, 1900.

Warning: These citations may not always be complete (especially for serials).