1. Arizona Dairy Herd Improvement Annual Report;Armstrong,1975
2. Arizona Dairy Herd Improvement Annual Report;Armstrong,1992
3. Evaluation of Brown Swiss, Holsteins and Jerseys under hot arid climates for dairy production;Armstrong,1998
4. Comparing three different dairy cattle cooling systems during high environmental temperatures;Armstrong;J. Dairy Sci.,1993
5. Environmental modification for dairy cattle housing in arid climates;Armstrong,1993