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Color image of Spring Lake and San Marcos River with two people in a canoe.
Back text: "DB-172 the Headwaters of the SAN MARCOS RIVER which flows through the city of San Marcos, Texas. It is estimated the river's source is fed by springs which yield up to 200,000,000 gallons per day. This view is very near to the famous Aquarena Submarine Theater and the Glass Bottom Boats. Anscochrome by Don R. Bartels."
19347-B