2 resultados para Lead zirconate-titanate
em CUNY Academic Works
Resumo:
Students are pictured with a professor around a workbench during a lead wiping class at the New York Trade School. Photograph is black and white.
Resumo:
A lead wiping class at the New York Trade School is shown. Many students can be seen around workbenches. Black and white photograph that is damaged by scratches and is yellowing.
