28º International Congress of Occupational Medicine

€ 0,60 + € 0.30 - Logo of the Congress, clinical work and Luigi Devoto pink bow - Color polychrome - Perforation stamp 13 × 13 ¼ b - Intaglio printing - Printed from IPZS Rome - 50 sheets - Size 40 × 30 (mm) - Drawing P. Baldi - Circulation 5.000.000.