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10.1007%2FBF00174006
10.1007%2FBF00174006
https://api.crossref.org/works/10.1007%2FBF00174006
c96a3d335498a818973415587a5a096e1ef1f3d2
P854
10.1007%2FBF00174006
https://api.crossref.org/works/10.1007%2FBF00174006