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Richardson, Jeffrey R.  "When the Ships Come In," National Parks, 2003, 77:7-8 (July-Aug), 27-31

Abstract:  The 3.3 million acres of Glacier Bay National Park in
Alaska contain the nation;s largest protected marine ecosystem, including 17 tidewater glaciers connecting the bay with rugged mountains. Rich wildlife populations and the stunning scenery draw hundreds of thousands of tourists annually, primarily on cruise ships. The 100 ships allowed in each season are direct physical threats to marine species, create a high level of disturbance which affects wildlife in general, and represent the high costs of tourism on the natural environment. The park's Vessel Management Plan establishes quotas for the large cruise ships as well as smaller vessels.