TY  - RPRT
TI  - Permeable structures in normal enamel.
AU  - M T JANSEN
AU  - J B VISSER
PY  - 1950
DO  - 10.1177/00220345500290051001
UR  - https://pubmed.ncbi.nlm.nih.gov/14774480/
ID  - 14774480
ER  -