You tried going to https://civil.ubc.ca/people/faculty/campanella/publications/020-Applied%2520Cone%2520Research-Campanella%2520&%2520Robertson-ASCE-81.pdf, and it doesn't exist. All is not lost! You can search for what you're looking for.
https://civil.ubc.ca/people/faculty/campanella/publications/020-Applied%2520Cone%2520Research-Campanella%2520&%2520Robertson-ASCE-81.pdf