-- See Also the narrower term Fortification Here are entered general works on forts and fortification, including earthwork fortifications. Works on earthwork in engineering operations are entered under Earthwork. Works on prehistoric and early earthwork remains are entered under Earthworks (Archaeology). --subdivision Defenses under names of countries and names of individual forts
-- See Also the narrower term Topographical surveying Here are entered works on the techniques of topographical surveying in general and as practiced in particular geographic localities. Works presenting the results of topographical surveys are entered under the name of the place surveyed with the subdivision Surveys. --subdivision Surveys under names of countries, cities, etc., e.g. Canada--Surveys
