312,470 PROCEEDINGS Proceedings of the Thirteenth International Cryogenic Engineering Conference Beijing, China 24-27 April 1990 / ed. C.S. Hong , org. by International Cryogenic Engineering CoMdttee. - London: Butter-worth-Heinemann, 1990. - XXIX, 958 s. : 11. ,wykr. ; 30 cm (Cryogenics, ISSN 0011-2275 , vol. 38, suppl.)