TY  - RPRT
TI  - Rectal endosonography.
AU  - U Hildebrandt
AU  - G Feifel
AU  - K W Ecker
PY  - 1989
DO  - 10.1016/0950-3528(89)90016-x
UR  - https://pubmed.ncbi.nlm.nih.gov/2692730/
ID  - 2692730
ER  -