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Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary

Plan of the hydrography of a portion of the Colorado River between Black Canyon and the Arizona-Sonora Boundary