Document aBRKGpr4e604g1Kym5QgzD2pY

W^ pTSr^^ WgM SUiW ify ii'iii li.,1 'I' " >" ! 1 ' ' ' ! ' M W ) I W yu <ri' :D : ,i ppr* LlA*^n LEAD INDUSTRIES ASSOCIATION 4*0 LBUfiJTO* AVCLMJt NCW VOVC M.Y. ' April 17, 1040 To Kcabern of the Lena Industries Associations Subject! _ Air rtytlene Foundation Bulletin ' Tne Air hygiene Foundation of Alterlea has recently published Bulletin Ao. Ill of tne Aedlcal beri.es, aitltlw: "The Choice of Uetnods of Koentgeai Lx*.ali4.tIon of tne Cuest for Dig- noetic Surveys* (7? pages) 'V Tuls bulletin reports tne findings froa x-ray resetuc.i supported by t..e Foundation at tne University of Pennsylvania and fives practical pro cedures for x-ray examinations of large groups. If you desire copies of tnls publication ae shall be gi*.a to obtain tnea for you at cost, name ly, .`1.00 each, plus postage. Very truly yours, ^ Cy&^CC-CrttvOA-W- Secretary. *9&m