Here is an interesting resource from the National Library to mark 50 years since the passing of the Equal Pay Act 1972 in New Zealand.

https://natlib.govt.nz/he-tohu/learning/discover-more/the-journey-towards-pay-equity-in-aotearoa?fbclid=IwAR1kswCf4U6SLbDvoWK32x3B301AeXHFwNfmyQu1Mg_b1j1cNOXm39osT3I