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Litteratur

1. Sulikowski, J.A., J. Kneebone, S. Elzey, J. Jurek, P.D. Danley, W. Huntting Howell and P.C.W. Tsang, 2005. Age and growth estimates of the thorny skate (Amblyraja radiata) in the western Gulf of Maine. Fish. Bull. 103:161-168.

2. Bigelow, H.B. and W.C. Schroeder, 1953. Sawfishes, guitarfishes, skates and rays. Mem. Sears Found. Mar. Res. 1(2):1-514.