K. Johnsgard

The stress seekers: a psychological study of sports parachutists, racing drivers, and football players.

K. Johnsgard, B. Ogilvie, K. Merritt, 1975, The Journal of sports medicine and physical fitness.

The motivation of the long distance runner: II.

K. Johnsgard, 1985, Journal of Sports Medicine and Physical Fitness.

The motivation of the long distance runner: I.

K. Johnsgard, 1985, Journal of Sports Medicine and Physical Fitness.