CRANV2
Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2
Citation indexing and bibliographic coupling
chapter
Cyril Cleverdon
Michael Keen
Cranfield
An investigation supported by a grant to Aslib by the National Science Foundation.
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
- 244 -
QUES -
2 2
3 7 3 5 2 2
0 4
0 5
- 5 0 1
3
3 1
2 1 1
10 - 6
2 4
3 - 2 - 1
3 2 3 2
9 9 5 4 5 3
7 8 4 4 4
2 3
2
- 3
- 1 1
3 39 3 30 3 17
3 0
2 11 2 5 2 2
- 1
2 COUPLING LEVEL
1 2 1 TION 1 2 3
2 2
14 2
- R NR R NR R NR R
3 4
NR R 5
NR R 6 7
NR R NR
79
- 1 1
2 i0 2 136
2 2
3 53 0 15
- 2 1
2 100
4 2 1
3 0
4 76 4 3
- 3 2 2
- 1 19
116 4 I0
2 6 204 2 7
6
2 8 77 3
118
2 33
3 262
1
3 34 3 1 1
l 19 3 10 3 5 3 3 16
3 64 2
119 23
6 317 2
6 7
83 4 31 3 I0
121
122 2 201 45
123 18 7
126 II 2 - 73 15 - 8 3
65 2 22
130 - 8
4 136 6
2 23 2 10 2 3
132 2 397 108 -
136 40
6 48 20
5 8 3
137 5 , 2
6 125 3
4 33
141 4 11
6 3 5
- 2
145 - 2 ]
12 314 12 76 I0 38 I 9 19
146 9 363 9 82 8 45
147 7
5 24 19
3 2 3 -
148 3 -
4O 11 3 -
l{J[OCRerr] 4 145 1
2 36 25 -
170 12
79 17 3
181 - i03 26
182 12 ]
3 4
47 2 9 - I
189 4
- 19 3 - 1
190 5 42 5 6 4 1
223 2 63 2 13" - 1
224 3 221 2 56 - 8 I
225 4 636 4 199 3 95 3
226 56
7 74 7 15 5
227 2 3 3
8 0
2 1 2 1
230 2 274 65 27 - 3
25O 7 213 7 62 6
261 37 5 20
30 8 -
264 2
2 9 2 1
266 4 141 3 35
268 - 2
269
272 3 94 3 23
273 6 43 6 7
274 - 49 12
317 2 13 2 4
323 2 66 2 13
36O 4 337 4 112 1
FIGURE 7.1T
RESULTS FOR 42 SEARCHES WITH 1400
DOCUMENTS BY BIBLIOGRAPHIC COUPLING