2 media by topic ∙ page 1 of 1
Miss Grace Hazen, Bu. of Standards testing radio wave meters, 5/19/25
A black and white photo of a woman in a lab. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description
Miss Grace Hazen, Bu. of Standards testing radio wave meters, 51925
Title from unverified data provided by the National Photo Company on the negative or negative sleeve. Gift; Herbert A. French; 1947. General information about the National Photo Company collection is available ... More