The link you gave is down but I was bale to pull the pdf off of archive.org with the link plugged in there. Find it attached to this post.
This book written by RGB:
Sex bias in the U.S. Code : a report of the U.S. Commission on Civil Rights ; April 1977.
is hell to find as a copy online - actually it is impossible. Very strange. There are physical copies in libraries but try finding one online and you can't. I wonder why????