F. E. Kurtz jt. Effect of Pollution of Air with Ozone on Flavor of Spray-Dried Milks (reprint Journal of Dairy Science, V .52 No 2); F.E. Kurtz jt. Effect of Filtering Ozone-Polluted Dryer Air Through Activated Charcoal on the Flavor of Foam Spray-Dried Whole Milk ( Reprint Journal of Dairy Science, V. 52 No 4)