“Power with Heliostats,” Hildebrandt, Solar Energy Lab

“Power with Heliostats,” Hildebrandt, Solar Energy Lab, Box: 67, Folder: F274. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/90607 Accessed July 26, 2024.