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1
Parks and people managing outdoor recreation at Acadia National Park /
Julkaistu 2009An electronic book accessible through the World Wide Web; click to view
Elektroninen E-kirja -
2
Dog days, raven nights
Julkaistu 2011An electronic book accessible through the World Wide Web; click to view
Elektroninen E-kirja -
3
Improving interactions between coastal science and policy proceedings of the Gulf of Maine Symposium, Kennebunkport, Maine, November 1-3, 1994.
Julkaistu 1995An electronic book accessible through the World Wide Web; click to view
Elektroninen Konferenssijulkaisu E-kirja