Graham, J. D. 1. (1850). Message from the governor of Maryland: Transmitting the reports of the joint commissioners, and of Lt. Col. Graham, U.S. engineers, in relation to the intersection of the boundary lines of the states of Maryland, Pennsylvania & Delaware. Washington: Printed by Gideon and Co..

Graham, J. D. 1799-1865. Message From the Governor of Maryland: Transmitting the Reports of the Joint Commissioners, and of Lt. Col. Graham, U.S. Engineers, in Relation to the Intersection of the Boundary Lines of the States of Maryland, Pennsylvania & Delaware. Washington: Printed by Gideon and Co., 1850.

Graham, J. D. 1799-1865. Message From the Governor of Maryland: Transmitting the Reports of the Joint Commissioners, and of Lt. Col. Graham, U.S. Engineers, in Relation to the Intersection of the Boundary Lines of the States of Maryland, Pennsylvania & Delaware. Washington: Printed by Gideon and Co., 1850.