. . . . . "Maps" . "Swamp land records" . . . . . "Records documenting Minnesota's acquisition, management, and disposition of swamp lands. They include selection lists; microfilmed patents transferring title to the state from the federal government; microfilmed record books noting disposition of each parcel of swamp land; maps showing the location of swamp lands; and correspondence and lists pertaining to transfers, claims, and related matters." . . . . "Microforms" . . "Minnesota. State Land Office," . . . .