Supplementary material reads: Bill Selvin (formerly of Madison Square Garden) presents 'Introductory' Girls' Softball, sanctioned by the So. Calif. Amateur Softball Ass'n. Wrigley Field, 42nd & Avalon, ADams 3-4107, Sunday, May 1st, 2 p.m., in a nine inning feature game: Monrovia (America's Third Ranking Team) vs. Buena Park (1946 So. Calif. Champs)...".