TY  - BOOK
AU  - Gaegen-Ansert, Sandra L.
AU  - Hagen-Ansert, Sandra L.
TI  - Textbook of Diagnostic Sonography, 9th edition 
SN  - 978-0-323-82650-1
PY  - 2023///
CY  - St Louis, Missouri 
PB  - Elsevier
KW  - Sonography; ultrasounds; diagnostics; pregnancy
ER  -