From the 60s to the 80s, autism was basically "classic" autism. It was called "infantile autism" then. Or, later, just "autism."
From the 50s to the 60s, the concept of the "refrigerator mother" was prevalent. By the 70s, that concept had been debunked.
Asperger's (other than from Asperger himself) wasn't even a concept until 1981, and didn't become part of any diagnostic grouping until 1994.
At least in the US, until the late 70s, most people with Asperger's or "high-functioning" autism would have been diagnosed with "minimal brain dysfunction," "brain damage," "perceptual problems," or some such thing.
There was no concept of an "autistic spectrum" then. There was some vague concept of relatively high-functioning autism in the later 80s.