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4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11 (number)
12
12 (number)
13
13 (number)
19
19 (number)
40
40 (number)70
70 (number)
100
100
400
400 (number)
700
700 (number)
1000
1000 (number)
1000000
1,000,000
1048576
BookFi
CINAHL
CINAHLContextual Query Language
Contextual Query Language
DBLP
DBLP
Embase
Embase
HAL (公開アーカイブ)
HAL (open archive)
Internet Speculative Fiction Database
Internet Speculative Fiction Database
Library Genesis
Library Genesis
PubMed
PubMed
