※一部利用できない機能があります
| 1.
図書 |
図書
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prepared by the Federal Works Agency, Work Projects Administration for the City fo New York ; Arnold N. Lowan, technical director ; conducted under the sponsorship of the National Bureau of Standards ; Lyman J. Briggs, director ; Brehon Somervell, adnimistrator
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| 2.
図書 |
図書
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prepared by the Federal Works Agency, Work Projects Administration for the City fo New York ; Arnold N. Lowan, technical director ; conducted under the sponsorship of the National Bureau of Standards ; Lyman J. Briggs, director ; Brehon Somervell, adnimistrator
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| 3.
図書 |
図書
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National Geographic Society (U.S.) ; United States. National Bureau of Standards
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