Another book that's interesting is How Was It For You? by Virginia Nicholson, which is a social history of British women in the '60s. She's also written one on women in the '50s (which I've not read,) and Singled Out, about "surplus" women between the wars.
Experiences of marriage bars will have varied a lot. In education, it tended to vary according to which LEA it was. A lot of big corporates hung on to them for ages. Other jobs never had them - it was mostly "career-type" jobs, where women could be taking them from men. It was never as much of an issue with the sort of jobs that wouldn't be viewed as "men's" jobs anyway.
Whether or not there were formal marriage bars in place, there were social expectations, and they change more slowly than company policies or legislation. Whenever employment legislation is brought in, there will have already been some employers who had voluntary policies offering maternity leave or additional health and safety measures, but most will need the legislation to force them to implement such things. It's 51 years since the Equal Pay Act, and we still can't take it for granted - especially when it comes to extras like bonuses rather than base pay. There are still plenty of employers who avoid employing women in their fertile years, though they will say something like, "his experience was a better match," rather overtly admit to breaking the law. And if they do employ women, "well, she won't want that promotion, because she's got children," "she wouldn't consider a transfer to the office in that country," and so on - rarely do they actually ask the woman in question.
I work for an organisation which is pretty good as a woman's employer, but I still have female colleagues who've been advised not to have more children if they want to progress and so on. Not in my own department, obviously... there aren't any other women,besides me.