From these beginnings , computer simulation of evolution by biologists became more common in the early 1960s .
The methods were described in books by Fraser and Burnell ( 1970 ) and Crosby ( 1973 ) .
From these beginnings , computer simulation of evolution by biologists became more common in the early 1960s , and the methods were described in books by Fraser and Burnell ( 1970 ) and Crosby ( 1973 ) .