Document jyn41jYpKqjMOgv365vw66zRR

December 19, 1955 Kiss Corienne Casper Librarian United States Gypsum Company 300 Vest Adams Street Chicago 6, Illinois. Dear Kiss Casper: Tour letter of December 12 requesting 10 copies of the paper entitled Biological Effects of Calcined Gypsum Dust. An Experimental Study od Animal's Lungs has been received. Ve are gl&i to send you these reprints with our compliments. Tours sincerely. G..`..H. Schepers, K.D., D.Sc. Director