1 Combs, W.S., Jr. 1977. The measurement and prediction of irradiance available for photosynthesis by phytoplankton in lakes. University of Minnesota Ph.D. Thesis, Limnology.
2 Incoll, L.D., S.P. Long and M.R. Ashmore. 1977. SI units in publications in plant science. Commentaries in Plant Science (No. 28). Published in: Current Adv. Plant Science 9:331-343.
3 Jerlov, N.G. 1968. Optical Oceanography. Elsevier.
4 McCree, K.J. 1979. Radiation.
5 NBS Technical note 910-1, 1976. Self-study manual on optical radiation measurements.
6 Shibles, R. 1976. Committee Report: Terminology pertaining to photosynthesis. Crop Sci. 16: 437-439.
7 Tyler, J.E., and R.W. Preisendorfer. 1962. Light in the sea, p. 399-400. In M.N. Hill (ed.), The Sea, V.I. Interscience.

Other reports

LI-COR has a number of publications that contain more detail about radiation measurement, including factory calibration procedures, terminology, measurement errors, units conversions, and radiation theory. These publications are available on request from LI-COR; many of them can also be downloaded from LI-COR’s web site at

8 Principles of Radiation Measurement – a report on terminology, measurement errors, conversion between radiometric and photometric units, units and conversions used for quantum, photometric, and radiometric data, and condensed LI-COR calibration procedures.
9 Radiation Measurements and Instrumentation – a more detailed discussion of radiation theory, terminology, radiation measurement, and colorimetry.
10 Calibration Procedures for LI-COR Spectroradiometers, Radiation Sensors, and Lamps.
11 Immersion Effect and Cosine Collecting Properties of LI-COR Underwater Sensors.