It's in the book. So 1990. Internet says the inspiration for Alan Grant is Robert Bakker, and his first writings on it were in 1968: https://en.wikipedia.org

It's in the book. So 1990. Internet says the inspiration for Alan Grant is Robert Bakker, and his first writings on it were in 1968: https://en.wikipedia.org/wiki/Robert_T._Bakker https://en.wikipedia.org/wiki/Robert_T._Bakker