This is a very short paper by Linus Pauling. Apparently, he read an article where the author said that valence bond theory was not as popular and useful as it was. Obviously, the response came from Pauling and his response in fact was very short:
"I do not agree with this opinion."
The rest of the article explains how valence bond theory is still can be used in coordination compounds.
The article was published in Journal of Chemical Education, but here you can read it as pdf for free.