@misc{75566,
  author = {J Hall and R Dixon},
  title = {Productivity Measurement in R&D: Productivity Measurement Experiment (PROMEX) in Selected Research and Development Programs at the National Bureau of Standards. Final Report.},
  year = {1975},
  month = {1975-12-01},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}