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10.1007%2FBF00317442
10.1007%2FBF00317442
https://api.crossref.org/works/10.1007%2FBF00317442
81a10d5e9629dd0ef3a46a73f218914194381054
P854
10.1007%2FBF00317442
https://api.crossref.org/works/10.1007%2FBF00317442