information about National standard field
Field Hierarchy
| Parent | |||
|---|---|---|---|
Biology 36.7M papers | Chemistry 29.4M papers | Engineering 25.6M papers | Food science 2.6M papers |
Pulp and paper industry 545k papers | |||
| Current | |||
National standard 5,915 papers | |||
| Child | |||
Trends
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History