300,514 LOX-WORKSHOP First Lox [Liquid oxygen] - Workshop : a Symposium ; Long Term Portable Oxygen Treatment in Severe Disables COPD? [chronic obstructive pulmonary disease] - Rationale and Study Design : Lox-Group in Germany November 23, 1990 Berlin, FRG /guest ed-s : W. Mitlehner [et al]. - Basel [etc.] : Karger, 1992. - [4], V, [1], 46 s. : il., wykr. ; 28 cm (Respiration, ISSN 071-9676 ; vol. 59, suppl. 2)