Life Sciences and Space Research. . 12., : Seattle, Washington, USA, 21 June - 2 July, 1971 ; Proceedings of the Open Meeting of Working Group 5 of the Fourteenth Plenary Meeting of Cospar
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