• C-646, Spring Freeze Injury to Kansas Wheat (pdf)

University of Minnesota

• Growth and Development Guide for Spring Barley
• Growth and Development Guide for Spring Wheat

Montana State University/University of Idaho

• MB4387/MS118, Growth Staging of Wheat, Barley and Wild Oat...

University of Nebraska

• Freeze Injury to Nebraska Wheat, EC94-132-S

Ohio State University

• Wheat Growth Stages and Associated Management, AGF-126-01

Texas A&M University

• Freeze Injury on Wheat