20-59  Chinese Scientific Papers Taken by Major Foreign Referencing Systems by Discipline (2007)
	(piece)
	Precedence	Piece
Discipline		Total	SCI	EI	ISTP
Total		196629	79669	75568	41392
Mathematics	8	7836	4565	1209	2062
Mechanics	19	1822	270	1079	473
Information, Systems Science	27	802	355		447
Physics	3	20181	10966	7632	1583
Chemistry	1	28115	23356	4266	493
Astronomy	26	827	611	130	86
Earth Science	10	6410	3039	2325	1046
Biology	6	13107	7667	4628	812
Preventive Medicine	30	564	361		203
Basic Medicine	16	3107	2077	190	840
Pharmacy	24	1193	1102		91
Clinical Medicine	12	5377	4831		546
Traditional Chinese Medicine	37	63	63
Special Medicine	40	38	38
Agriculture	22	1233	993	36	204
Forestry	36	65	64		1
Livestock, Veterinary Medicine	37	63	63
Aquatic	33	293	276		17
Surveying & Mapping	28	798	1	676	121
Material Science	4	18399	7501	7593	3305
Engineering & Basic Technology Science	20	1466	65	379	1022
Mining	18	1911	22	1367	522
Energy	15	3195	398	2483	314
Metallurgy, Metallography	11	6307	1137	4670	500
Machinery, Instrument	13	5197	1210	3075	912
Power & Electrical Engineering	7	8240	38	7463	739
Nuclear Technology	32	447	188	138	121
Electronics, Communication & Automation	5	16533	2847	8552	5134
Computer	2	23892	1770	5939	16183
Chemical Engineering	21	1332	951	340	41
Light Industry & Textile Industry	35	130	1	31	98
Food	34	268	203	6	59
Civil Construction	9	6859	428	6094	337
Water Conservancy	29	726	53	665	8
Transportation	23	1232	7	1209	16
Aviation and Aerospace	25	1169	108	980	81
Environment	14	4135	1797	1997	341
Security	31	522	18	21	483
Management Science	17	2726	190	392	2144
Others	39	49	39	3	7
a) SCI refers to Science Citation Index, EI refers to Engineering Index, and ISTP refers to Index to Scientific & Technical Proceedings.