Non-secretary women were not in short supply at NASA at this time though. The work of Virginia E. Morrell and Bonnie J. McBride a few years earlier, at this same research center springs to mind.

There were some to be sure .. I wouldn't imply otherwise, none the less many existed that were not hired and most STEM heavy companies and institutions were very male biased.

(With the few and obvious exceptions such as Dame Vera Stephanie "Steve" Shirley's ventures)

FWiW I learnt a wee bit from Cheryl Praeger, Cathleen Morawetz, Robyn Owens, et al.