You tried going to https://civil.ubc.ca/people/faculty/campanella/publications/038-Use%2520of%2520Piezocone%2520Data-Robertson%2520et%2520al-ASCE%2520InSitu86.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/038-Use%2520of%2520Piezocone%2520Data-Robertson%2520et%2520al-ASCE%2520InSitu86.pdf