**Lucia Vigoroso, Federica Caffaro and Eugenio Cavallo**

Warning against Critical Slopes in Agriculture: Comprehension of Targeted Safety Signs in a Group of Machinery Operators in Italy Reprinted from: *Int. J. Environ. Res. Public Health* **2019**, *16*, 611, doi:10.3390/ijerph16040611 . . . **303**
