1.
Z Gesamte Hyg
; 18(3): 174-7, 1972 Mar.
Article
in German
| MEDLINE
| ID: mdl-5078310
2.
Dtsch Gesundheitsw
; 23(29): 1362-5, 1968 Jul 18.
Article
in German
| MEDLINE
| ID: mdl-5685930