TY - GEN AU - KNORR,M AU - GRAEF,W TI - [A contribution to hygienic evaluation of plastic dishes, especially during large-scale use] SN - 0003-9144 PY - 1998///1101 KW - Data Collection KW - Health Surveys KW - Humans KW - Hygiene KW - Hyperostosis, Diffuse Idiopathic Skeletal KW - Plastics N1 - Publication Type: Journal Article ER -