Título Abreviado	Título Completo	ISSN	fI_1999	fI_2000	fI_2001	fI_2002	fI_2003
ULSTER MED J	ULSTER MEDICAL JOURNAL	0041–6193	0.169	0.170	0.170	0.086	0.000
ULTRAMICROSCOPY	ULTRAMICROSCOPY	0304–3991	2.045	1.695	1.695	1.890	1.772
ULTRASCHALL MED	ULTRASCHALL IN DER MEDIZIN	0172–4614	0.604	0.925	0.925	1.183	1.114
ULTRASONIC IMAGING	ULTRASONIC IMAGING	0161–7346	1.059	1.794	1.794	1.312	0.900
ULTRASONICS	ULTRASONICS	0041–624X	0.552	0.711	0.711	0.629	0.844
ULTRASON SONOCHEM	ULTRASONICS SONOCHEMISTRY	1350–4177	1.000	0.947	0.947	1.633	1.337
ULTRASOUND MED BIOL	ULTRASOUND IN MEDICINE AND BIOLOGY	0301–5629	1.797	1.822	1.822	1.615	1.758
ULTRASOUND OBST GYN	ULTRASOUND IN OBSTETRICS & GYNECOLOGY	0960–7692	2.182	1.725	1.725	1.862	1.806
ULTRASTRUCT PATHOL	ULTRASTRUCTURAL PATHOLOGY	0191–3123	1.000	0.745	0.745	0.694	0.870
UNDERSEA HYPERBAR M	UNDERSEA & HYPERBARIC MEDICINE	1066–2936	0.277	0.544	0.544	0.528	0.451
UNDERWATER TECHNOL	UNDERWATER TECHNOLOGY	0141–0814	0.300	0.400	0.400	0.077	0.000
UNFALLCHIRURG	UNFALLCHIRURG	0177–5537	0.626	0.496	0.496	0.413	0.548
UPSALA J MED SCI	UPSALA JOURNAL OF MEDICAL SCIENCES	0300–9734	0.467	0.163	0.163	0.409	0.688
UROLOGE A	UROLOGE–AUSGABE A	0340–2592	0.367	0.333	0.333	0.497	0.457
UROL INT	UROLOGIA INTERNATIONALIS	0042–1138	0.313	0.394	0.394	0.504	0.471
UROL CLIN N AM	UROLOGIC CLINICS OF NORTH AMERICA	0094–0143	2.223	1.710	1.710	1.949	2.222
UROL RES	UROLOGICAL RESEARCH	0300–5623	0.832	0.993	0.993	0.950	1.103
UROLOGY	UROLOGY	0090–4295	2.289	2.489	2.489	2.762	2.456
USER MODEL USER–ADAP	USER MODELING AND USER–ADAPTED INTERACTION	0924–1868	0.571	0.389	0.389	1.941	2.524
USP FIZ NAUK+	USPEKHI FIZICHESKIKH NAUK	0042–1294	1.476	1.182	1.182	0.000	0.000
USP KHIM+	USPEKHI KHIMII	0042–1308	1.099	1.429	1.429	1.701	0.000
UTILITAS MATHEMATICA	UTILITAS MATHEMATICA	0315–3681	0.155	0.083	0.083	0.150	0.216
U CHICAGO LAW REV	UNIVERSITY OF CHICAGO LAW REVIEW	0041–9494	0.000	0.000	0.000	0.000	3.038
U CINCI LAW REV	UNIVERSITY OF CINCINNATI LAW REVIEW	0009–6881	0.000	0.000	0.000	0.000	0.549
U ILLINOIS LAW REV	UNIVERSITY OF ILLINOIS LAW REVIEW	0276–9948	0.000	0.000	0.000	0.000	1.000
U PA J INT ECON LAW	UNIVERSITY OF PENNSYLVANIA JOURNAL OF INTERNATIONAL ECONOMIC LAW	1086–7872	0.000	0.000	0.000	0.000	0.622
U PENN LAW REV	UNIVERSITY OF PENNSYLVANIA LAW REVIEW	0041–9907	0.000	0.000	0.000	0.000	3.247
U PITT LAW REV	UNIVERSITY OF PITTSBURGH LAW REVIEW	0041–9915	0.000	0.000	0.000	0.000	0.440
UCLA LAW REV	UCLA LAW REVIEW	0041–5650	0.000	0.000	0.000	0.000	2.507
URBAN AFF REV	URBAN AFFAIRS REVIEW	1078–0874	0.000	0.000	0.000	0.000	0.892
URBAN EDUC	URBAN EDUCATION	0042–0859	0.000	0.000	0.000	0.000	0.230
URBAN GEOGR	URBAN GEOGRAPHY	0272–3638	0.000	0.000	0.000	0.000	0.986
URBAN LAWYER	URBAN LAWYER	0042–0905	0.000	0.000	0.000	0.000	0.515
URBAN STUD	URBAN STUDIES	0042–0980	0.000	0.000	0.000	0.000	0.988
UROL ONCOL	UROLOGIC ONCOLOGY	1078–1439	0.000	0.000	0.000	0.000	0.818
USDA FOR SERV PNW RE	USDA FOREST SERVICE PACIFIC NORTHWEST RESEARCH STATION RESEARCH PAPER	0882–5165	0.000	0.000	0.000	0.000	0.000