Online Book Subjects: Plant hybridization Displaying 1 - 3 of 3 Die mutationstheorie v. 1 Vries, Hugo de Veit & comp. 1901-03 36. Mutation of Characters This classic work describes de Vries' research in mutations and how it led him to the rediscovery of Mendel's laws of heredity. Die mutationstheorie v. 2 Vries, Hugo de Veit & comp. 1901-03 36. Mutation of Characters This classic work describes de Vries' research in mutations and how it led him to the rediscovery of Mendel's laws of heredity. Versuche über Pflanzen-Hybriden Mendel, Gregor Im Verlage des Vereines 1866 35. Hereditary Characters