information about National standard field
Field Hierarchy
| Parent | |||
|---|---|---|---|
Biology 34.8M papers | Chemistry 28.4M papers | Engineering 23.9M papers | Food science 2.4M papers |
Pulp and paper industry 506k papers | |||
| Current | |||
National standard 5,321 papers | |||
| Child | |||
Trends
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History