@misc{indiciae9c2c3f888f77, title = {Constriction ring.}, author = {D BEATON}, year = {1955}, doi = {10.1111/j.1471-0528.1955.tb14842.x}, url = {https://pubmed.ncbi.nlm.nih.gov/13278795/}, note = {Source identifier: 13278795} }