American Physical Society    https://www.aps.org/careers/physicists/profiles/barrow.cfm

Fab Fems Stem Role Models:  https://www.fabfems.org/users/christina-washington

Oak Tree Book Reviews:  https://oaktreereviews.com/2016/11/13/ms-pearl-makes-a-discovery/   

Leadership Girl:  https://www.leadershipgirl.com/entrepreneur-interview-christina-washington/