00484oam 2200169z- 450 9910717437203321(CKB)4100000011903834(EXLCZ)99410000001190383420230509c2021uuuu -u- -engNational Science Foundation : an overviewWashington, D.CNational Science FoundationBOOK9910717437203321National Science Foundation : an overview3351432UNINA