Les Croisements Rationnels dans La Race Pure, Volume III - Traite Technique d'Elevage, Etude des Principaux Etalons Europeens (Theory of Thoroughbred Matings, Technical Treatise of Breeding, Study of Principal European Stallions) J. Vuillier (Lottery), 1928. Softcover, 325 pgs., very good, many pages uncut (unopened). French language. The meticulous research of Vuillier, which formed the Dosage Theory, used with much success in the breeding and racing studs of the Aga Khans. Scarce volumes in beautiful condition. Scarce volume in beautiful condition.