1. Staff of NASA Manned Spacecraft Center. Results of Fourth Manned Orbital Flight, May 15 and 16, 1963. NASA SP-45. Supt. Doc., U. S. Government Printing Office, Washington, D.C.
2. Presented at the Committee on Space Research Symposium;Parin,1964
3. Maintenance of cardiovascular adaptability during prolonged weightlessness;Graveline;Aerospace Med.,1962
4. Cardiovascular deconditioning during chair rest;Lamb;Aerospace Med.,1964