@misc{indiciaefc9dd43e680d, title = {Analysis of short-term variations in beach morphology ( and concurrent dynamic processes ) for summer and winter periods, 1971-72, Plum Island, Massachusetts — Illustration, Page 49}, year = {1977}, url = {https://www.biodiversitylibrary.org/page/32746950}, note = {Source identifier: page-32746950} }