Waring, G. T., Gilbert, J. R., Belden, D., Van Atten, A. and DiGiovanni Jr, R. A. (2010) “A review of the status of harbour seals (<i>Phoca vitulina</i>) in the Northeast United States of America”, NAMMCO Scientific Publications, 8, pp. 191–212. doi: 10.7557/3.2685.