共 50 条
- [1] CALIBRATED NULL CIRCUIT FOR PERKIN-ELMER INFRA-RED SPECTROMETER REVIEW OF SCIENTIFIC INSTRUMENTS, 1948, 19 (02): : 116 - 117
- [2] A TWIN MICROSCOPE FOR THE PERKIN-ELMER MODEL 21 INFRA-RED DOUBLE-BEAM SPECTROPHOTOMETER ACTA CHEMICA SCANDINAVICA, 1958, 12 (06): : 1356 - 1357
- [3] SEMI-MICRO KBR UNIT FOR USE WITH PERKIN-ELMER MODEL 21 INFRA-RED SPECTROPHOTOMETER SPECTROCHIMICA ACTA, 1957, 9 (02): : 169 - 170