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@article{MZ_1933__37_168464, author = {A.H. Copeland}, title = {A matrix theory of measurement.}, journal = {Mathematische Zeitschrift}, pages = {542--555}, publisher = {mathdoc}, volume = {37}, year = {1933}, zbl = {0007.25203}, url = {http://geodesic.mathdoc.fr/item/MZ_1933__37_168464/} }
A.H. Copeland. A matrix theory of measurement.. Mathematische Zeitschrift, Tome 37 (1933), pp. 542-555. http://geodesic.mathdoc.fr/item/MZ_1933__37_168464/