20-62 Chinese Scientific Papers Taken by Major Foreign Referencing Systems by Discipline (2009)
	(piece)
Discipline	Precedence	Piece
		Total	SCI	EI	ISTP
Total		253982	108806	93017	52159
Mathematics	6	15952	5620	9721	611
Mechanics	8	12837	514	12292	31
Information, Systems Science	33	447	447
Physics	3	26304	13927	11255	1122
Chemistry	1	42041	28799	12722	520
Astronomy	25	1057	822	169	66
Earth Science	13	4827	3509	796	522
Biology	7	15237	13122	1227	888
Preventive Medicine	28	657	573	35	49
Basic Medicine	11	5534	4880	24	630
Pharmacy	23	1317	1312		5
Clinical Medicine	10	7128	7015	15	98
Traditional Chinese Medicine	37	155	155
Special Medicine	40	25	25
Agriculture	22	1844	1273	466	105
Forestry	38	107	93		14
Livestock, Veterinary Medicine	31	544	544
Aquatic	36	267	265		2
Surveying & Mapping	35	384	2	382
Material Science	5	18210	6860	9094	2256
Engineering & Basic Technology Science	12	4972	1478	3180	314
Mining	32	464	72	391	1
Energy	20	2760	759	693	1308
Metallurgy, Metallography	21	2644	1226	1096	322
Machinery, Instrument	9	8068	1504	5410	1154
Power & Electrical Engineering	18	3281	13	3268
Nuclear Technology	30	575	372	124	79
Electronics, Communication & Automation	4	23709	4324	6780	12605
Computer	2	28009	2736	3706	21567
Chemical Engineering	17	4267	1426	2783	58
Light Industry & Textile Industry	39	87	3	84
Food	27	886	391	429	66
Civil Construction	16	4416	727	1898	1791
Water Conservancy	34	431	65	146	220
Transportation	26	1002	9	903	90
Aviation and Aerospace	24	1147	283	674	190
Environment	29	619	3	616
Security	15	4446	3288	318	840
Management Science	19	2854	191	2068	595
Others	14	4471	179	252	4040
a) SCI refers to Science Citation Index, EI refers to Engineering Index, and ISTP refers to Index to Scientific & Technical Proceedings.