Cockburn - boundary question - paperback or softback - X555z

Anonymous - United States' boundary question - paperback or softback - X555z

Grattan - Whereabouts Unknown - New paperback or softback - X555z

Scidmore - Alaska Boundary Question .. - New paperback or softback - X555z

Okoh - God's Boundary - New paperback or softback - X555z

Winchell - Minnesota's Northern Boundary - New paperback or softback - - X555z

Taylor - Beyond the Boundary Fence - New paperback or softback - X555z

Anonymous - Letters on the boundary line - paperback or softback - X555z