A better urchin drag
Porter, K. (1998). A better urchin drag, in: Dorsey, E.M. et al. Effects of fishing gear on the sea floor of New England. pp. 117-118
In: Dorsey, E.M.; Pederson, J. (1998). Effects of fishing gear on the sea floor of New England. Conservation Law Foundation: Boston. ISBN 1-892787-00-8. 160 pp., more
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