1. The French and German farm censuses, for instance, placed much stress on this point. Cf also B. E. Cracknell and H. Palca, “Farm size and farm business,” Agriculture (London 1959, Mar).
2. See for instance F. Riemann, “Grösse und Verbleib aufgelöster landwirtschaftlicher Kleinbetriebe,” Berichte über Landwirtschaft 1962:2, pp 244–290, and
3. J. Ashton and B. E. Cracknell, “Agricultural holdings and farm business structure in England and Wales,” Journal of agricultural economics, Vol. 14, No 4 (Dec 1961), pp 472–499.
4. The concentration index was developed mathematically by C. Gini, Indici di concentrazione e di dipendenza (Torino 1922), especially pp 16 sqq. Among several applied uses, see for instance G. Loyo, La concentración agraria en el mundo (Mexico City 1933), especially p. 41
5. A. Bilimović, "Die vergleichende Untersuchung von Agrarstrukturen," Weltwirtschaftliches Archiv (Münster 1939), pp 493-522, and (anonymous), "A propos de la répartition de la terre en France. La notion de concentration économique, " Etudes et conjoncture, Economie française (Paris 1951, Sep-Oct), pp 72-77.