| 250 / | HD | RADIANT ENERGY |
| 336.1 | DF | INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING {16} |
| 390.01 | DF | .~ Neutron responsive means {10} |
| 390.07 | ![]() | .~.~ Spectrum analysis {2} |
| 390.08 | DF | .~.~.~> Using time-of-flight spectrometers |
| 390.09 | DF | .~.~.~> Using diffractometers |