Abstract
References
1.
1.
Kremkau FW
. Diagnostic Ultrasound: Principles, Instru- ments, and Exercises,
Ed 3 . Philadelphia , W. B. Saunders , 1989 .
2.
2.
Kremkau FW
. Diagnostic Ultrasound: Principles and In- struments.
Philadelphia , W. B. Saunders , 1990 .