View of workers on top a building under construction at the California Institute of Technology, in Pasadena. A crane is used to hoist cement and other materials to and from workers on top of the building. Two cement trucks are also shown.
California Institute of Technology Universities and colleges--California--Pasadena Buildings--California--Pasadena Construction workers--California--Pasadena Concrete mixers Cranes, derricks, etc Pasadena (Calif.)
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