Life Sciences and Space Research. . 14., : Varna, Bulgaria, 29 May-7 June 1975 and Symposium on Gravitational Physiology Varna, Bulgaria, 30 and 31 May 1975 ; Proceedings of the Open Meeting of the Working Group on Space Biology of the Sixteenth Plenary Meeting of COSPAR
Life Sciences and Space Research. . 12., : Constance, F.R.G., 23 May - 5 June 1973 ; Proceedings of the Open Meeting of the Working Group on Space Biology of the Sixteenth Plenary Meeting of COSPAR