Advances in Cryogenic Engineering Vol．21 Vol．21 - edited by K．D．Timmerhaus and D．H．Weitzel; edited by K．D．Timmerhaus and D．H．Weitzel (Plenum Press)
Proceedings of the 1975 Cryogenic Engieering Conference held at Qeen's University, Kingston, Ontario, Canada, July 22-25, 1975