Magnetic field detectors from the first commercial magnetocephalography scanner (MEG).
1990s
1990s
1989
1989
2000-100 BCE
1990
1989
1990s
1990-96
1990
1990
1989
1989
1990
4000-2001 BCE
1989
1989
1989
1989
1989
1989
1990
1990
1980s/ early 1990s
late 1980s/ ealry 1990s
1990s
1990s
2000-1350
1990
1989
1989
1990-95
circa 1990s
30 CE
30 CE
circa 1990
1990
circa 1989
3500-1000
1990s
1989
1970 and post 1989
1990
circa 1990
2686-2613 BCE
1989
1989
circa 1990
circa 1990
circa 1990
circa 1990