Here is another woman who gave Gloria Chandler assistance with at least a few of her early recordings in the Books Bring Adventure Series. After a quick read, Mary Howard seems like the Rosie-the-Riveter of the record industry. Her studio was also located in New York. I’ve got a whole lot of reading to do to learn more about her.
A fellow researcher I reached out to about the project shared more information about Mary Shipman Howard :) https://en.wikipedia.org/wiki/Mary_Shipman_Howard
The network of women Gloria associated with were all fantastic people.