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Table 1. 
Percentage total contribution factors, extracted from Vinkler (1993, Table 5)
Author count (observations)1st author2nd author3rd author4th author5th author
2 (6) 71 29       
3 (12) 61 26 13     
4 (13) 54 31   
5 (11) 34 14 11 17 24 
Author count (observations)1st author2nd author3rd author4th author5th author
2 (6) 71 29       
3 (12) 61 26 13     
4 (13) 54 31   
5 (11) 34 14 11 17 24 
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