共 50 条
- [36] Ionosphere researches of the National Bureau of Standards TRANSACTIONS-AMERICAN GEOPHYSICAL UNION, 1937, 18 : 182 - 183
- [37] FIELD STRENGTH AND RFI STANDARDS AT NATIONAL BUREAU OF STANDARDS IEEE ELECTROMAGNETIC COMPATIBILITY SYMPOSIUM RECORD, 1968, (10): : 149 - &
- [38] NATIONAL BUREAU OF STANDARDS CONTRIBUTION TO TECHNOLOGICAL MEASUREMENTS AND STANDARDS MATERIALS RESEARCH AND STANDARDS, 1968, 8 (08): : 29 - &
- [39] TRANSFER LEAK STUDIES AND COMPARISONS OF PRIMARY LEAK STANDARDS AT THE NATIONAL-BUREAU-OF-STANDARDS AND SANDIA-NATIONAL-LABORATORIES JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1986, 4 (03): : 334 - 337
- [40] NEW STANDARD SAMPLES ISSUED BY THE NATIONAL BUREAU OF STANDARDS FOR USE IN PH STUDIES JOURNAL OF THE ASSOCIATION OF OFFICIAL AGRICULTURAL CHEMISTS, 1946, 29 (01): : 114 - 114