共 5 条
[1]
*DUNL CO, 1970, SN1526 INF ART
[2]
KNUTTGEN H, 1959, THESIS OHIO STATE U
[3]
NASH E, 1968, WORLD TENNIS MAR, P52
[4]
PLAGENHOEF S, 1970, FUNDAMENTALS TENNIS
[5]
POUZZNER JG, 1966, THESIS SPRINGFIELD C