NIELSEN ARNOLD B. W. [wspolaut.] 297,189 RONNE PAUL, NIELSEN ARNOLD B. W. Development of ion X-ray tube : with a description of the collection in the Medical Historical Museum University of Copenhagen / by Paul Ronne and Arnold B. W. Nielsen ; Collaborating ed. the Foundation of Poul Lundbeck, Eng. M. Sc. - Copenhagen : C. A. Reitzel Publ., 1986. - 270, [1] s. : il., wykr. ; 26 cm (Acta Historica Scientiarum Naturalium et Medici-nalium, ISSN 0065-1311 ; iol. 35) ISBN 87-7421-517