Notes and Data on Differentiating Between Classes Contains manuscript and typescript notes on differentiating between classes, two draft typescripts of a paper titled "Coefficients for differentiating between Classes", and an offprint of "Isolated Variation in Greenlandic Eskimo Crania" by W S Laughlin and J B Jørgensen, published in <i>Aeta Genetica et Statistica Medica</i>, 6, 1956. 1946