Principles of cultivar development
Macmillan , Collier Macmillan, c1987
Walter R. Fehr, editor
Macmillan , Collier Macmillan c1987 Principles of cultivar development v. 2
Available at 17 libraries
Walter R. Fehr
Macmillan , Collier Macmillan c1987 Principles of cultivar development v. 1
Available at 18 libraries