# | Class | status | |
---|---|---|---|
1 |
S:78138261
M:CROSSINDEX O:Publishers International Linking Association, Inc. DBA CrossRef |
9, 41, 42 | Dead |
2 |
S:78138268
M:CROSSTEXT O:Publishers International Linking Association, Inc. DBA CrossRef |
9, 41, 42 | Dead |
3 |
S:78138271
M:CROSSREF SEARCH O:Publishers International Linking Association, Inc. DBA CrossRef |
9, 41, 42 | Dead |