Transthoracic echocardiogram 1970-01-01
Ultrasonography of deep vein thrombosis 1970-01-01
Ultrasonography of liver tumors 1970-01-01
Ultrasound biomicroscopy 1970-01-01
Ultrasound energy 1970-01-01
Ultrasound-enhanced systemic thrombolysis 1970-01-01
Ultrasound-guided lumbar puncture 1970-01-01
Ultrasound-modulated optical tomography 1970-01-01
Vaginal ultrasonography 1970-01-01
130th meridian west 1970-01-01
136th meridian west 1970-01-01
137th meridian east 1970-01-01
137th meridian west 1970-01-01
13th-century English mathematicians 1970-01-01
14th-century English mathematicians 1970-01-01
168th meridian east 1970-01-01
169th meridian east 1970-01-01
169th meridian west 1970-01-01
16th meridian east 1970-01-01
Alcuin 1970-01-01