@misc{indiciaee802b76f3cbd,
  title = {Image Contrast and Phase Modulated Light Methods in Polarization and Inteference Microscopy. Instruction Manual for the PAR EPM-1 Photoelectric Polarizing and Interference Microscope},
  author = {Allen, R. D.},
  year = {1964},
  url = {https://ntrs.nasa.gov/citations/19660006008},
  note = {Source identifier: 19660006008}
}