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2. J.E. Hill (1975), ‘Proposed method of testing for rating thermal storage devices based on thermal performance’, Proc. Solar Energy Storage subsystems for the heating and cooling of buildings, Charlottesville, Virginia, April 16-18, 1975, pp. 101 - 105.
3. G.E. Kelly and J.E. Hill (1975), ‘Method of testing for rating thermal storage devices based on thermal performance’, NBS Report No. NBSIR 74-634, National Bureau of Standards, Washington, DC, April 1975.
4. J.E. Hill, G.E. Kelly and B.A. Peavy (1977), ‘A method of te sting for rating thermal storage devices based on thermal performance’, Solar Energy, 19, 721 - 732.
5. J.E. Hill, E.R. Streed, G.E. Kelly, J.C. Geist, and T. Kasuda (1976), ‘Development of proposed standards for testing solar collectors and thermal storage devices’, NBS Technical Note 899, National Bureau of Standards, Washington, DC, February 1976.