RYAN T.J. 550,593 BEYOND Beyond occlusion : dermatology proceedings : Proceedings of a Symposium held in Paris, 26/27 November, 1987 / ed. by T.J. Ryan. - London ; New York : Royal Society of Medicine Services, 1988. - XII, 73 s. , 2 s. tabl. : il. , wykr. j 24 cm (International Congress and Symposium Series ; nr 137) ISBN 0-905958-75-6