Read this the summer of '72 in Santa Maria, California. It was a library book. A girl in a wheelchair and her older sister are shopping and the chair gets 2 flat tires. A young guy (ex-Army, I think) with a prosthetic leg helps them get home. He and the older sister date, but he steps on her foot as they dance. He plays wheelchair basketball, his chair tips and he's standing upright for a second, then face-plants and everyone laughs. I know this isn't much to go on, but it's all I've got.