Co-op 27, 28, 29, 30, and 31
Subtitle: five disease-resistant apple selections released for advanced testing
By: S.S. Korban ... [et al.].
Contributors: Korban, S. S.; Purdue University. Agricultural Experiment Station.
Series: Bulletin / Agricultural Experiment Station, College of Agriculture, University of Illinois at Urbana-Champaign -- 789; Bulletin (University of Illinois at Urbana-Champaign. Agricultural Experiment Station) -- 789.
Publisher: Agricultural Experiment Station, College of Agriculture, University of Illinois at Urbana-Champaign in cooperation with the Agricultural Experiment Station of Purdue University, West Lafayette, Indiana
Published: 1990
Place of publication: [Urbana, Ill.]
Subjects: Apples -- Varieties; Apples -- Diseases and pests.