I remember an old interview with Mickey Mantle talking about playing with Ted Williams in an All Star Game. He said that after talking to Ted, asking him about what he does at different part of his swing, he batted badly for 2 weeks. Keep on thinking about the swing, instead of just swinging.
Probably not as the copyright last for either 95 years from publication or 70 years after the authors death depending on when it was published.
That said copies are easy to find for $0.99 on amazon and like sites and "free" PDF links like the one the OP posted can be found very easily with a google search.