Significance of Irregular Small Opacities in Radiographs of Coalminers in the USA

Autor: Amandus, H. E., Lapp, N. L., Jacobson, G., Reger, R. B.
Zdroj: British Journal of Industrial Medicine, 1976 Feb 01. 33(1), 13-17.
Databáze: JSTOR Journals