New Mexico Atlas of Historical County Boundaries
John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Emily Kelley, Historical Compiler; Laura Rico-Beck, GIS Specialist and Digital Compiler; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant
Copyright The Newberry Library 2007
ARIZONA (extinct)
CAPE GIRARDEAU (Mo.)
CASTLE DOME (Ariz., proposed)
DOŅA ANA (Ariz., proposed)
EWELL (Ariz., proposed)
JEFFERSON (see SAN MIGUEL)
LEONARD WOOD (see GUADALUPE)
MESILLA (Ariz., proposed)
Missouri Territory (non-county area)
NEW MADRID (Mo.)
Republic of Texas (see Texas)
RIO GRANDE (proposed)
SANTA ANA (extinct)
SOUTH VALLEY (proposed)
Spanish Mexico (see Mexico)
WASHINGTON (see QUAY)