Conversation so far:
What type of work did Lillian Moller Gillbreth do?
For more than forty years, Lillian Moller Gilbreth's career combined psychology with the study of scientific management and engineering.

Question: What other type of work did she do?
Self-contained rewrite: What other type of work did Lillian Moller Gillbreth do besides psychology, and the study of scientific management and engineering?