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  1.  10
    A comment on “expenditures on research and development in Poland”.Christopher Freeman - 1967 - Minerva 5 (3):371-375.
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  2.  18
    Research and development in Czechoslovakia.Christopher Freeman - 1968 - Minerva 6 (4):598-601.
  3.  6
    The measurement of scientific and technological activities.Christopher Freeman - 1969 - [München: OECD Publishing.
    Published with the aim of enriching the literature dealing with the measurement of scientific and technological activities.
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