Peisner, D B Vaginal ultrasound for the practicing clinician. Equipment selection. [electronic resource] - Clinical obstetrics and gynecology Mar 1996 - 158-66 p. digital Publication Type: Journal Article ISSN: 0009-9201 Standard No.: 10.1097/00003081-199603000-00016 doi Subjects--Topical Terms: Equipment DesignGynecology--instrumentationProduct Surveillance, PostmarketingUltrasonography--economics