1. Girard , P. F. 1958 The handling qualities of VTOL aircraft at low speed
2. Girard , P. F. 1959 Piloting procedures and some human factors aspects of the transition cycle of the X-13 aircraft
3. Everett , W. L. 1959 Some unique aspects in the development and flight testing o a jet reaction vertical attitude VTOL aircraft
4. Girard , P. F. 1959 Medical and human engineering aspects of flight in Ryan VTOL and STOL aircraft
5. Girard , P. F. 1959 Some significant findings during the flight testing of a vertical attitude turbojet VTOL aircraft