Canalicular obstruction and the Lester-Jones tube what to do when all else fails.

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@article{Welham1973CanalicularOA, title={Canalicular obstruction and the Lester-Jones tube what to do when all else fails.}, author={Richard A N Welham}, journal={Transactions of the ophthalmological societies of the United Kingdom}, year={1973}, volume={93 0}, pages={623-32} }