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All Fields
((ars OR "agricultural research") AND benchmark?) OR ("beasley lake" OR "choptank river" OR "goodwin creek" OR "leon river" OR "little river" OR "north walnut creek" OR "st. joseph river" OR "salt river" OR "mark twain" OR ("south fork" AND "iowa") OR "town brook" OR "upper big Walnut creek" OR "upper washita river" OR "yalobusha river" OR "mahantango creek" OR "goodwater creek")
Remove constraint All Fields: ((ars OR "agricultural research") AND benchmark?) OR ("beasley lake" OR "choptank river" OR "goodwin creek" OR "leon river" OR "little river" OR "north walnut creek" OR "st. joseph river" OR "salt river" OR "mark twain" OR ("south fork" AND "iowa") OR "town brook" OR "upper big Walnut creek" OR "upper washita river" OR "yalobusha river" OR "mahantango creek" OR "goodwater creek")
Topic
Maps
Remove constraint Topic: Maps
Format
Book OR Microfilm OR Map
Remove constraint Format: Book <strong class='text-muted constraint-connector'>OR</strong> Microfilm <strong class='text-muted constraint-connector'>OR</strong> Map