Nearly three-quarters of the students surveyed last fall by the National Association of College Stores said they preferred traditional print textbooks to digital texts, according to a report from the organization. And just over half the students said they would not consider buying course textbooks in digital form even if they were available. The association said digital course materials now account for only 2% to 3% of text sales at stores that provide them, although that figure is expected to rise to 10% to 15% percent within two years. The survey included students from 19 institutions.