Robuta

https://www.aanda.org/articles/aa/full_html/2017/01/aa29321-16/aa29321-16.html
Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics
magnetic fieldsmeasuringwatermaserssynchrotron
https://www.uspto.gov/web/patents/classification/cpc/html/defH03C.html
coding decodingcpcdefinitionmodulationmasers
https://www.nist.gov/publications/performance-soviet-and-us-hydrogen-masers
hydrogen masersperformancesovietunist
https://www.aanda.org/articles/aa/ref/2008/28/aa09799-08/aa09799-08.html
Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics
methanol masersresolvingdistanceambiguitiestowards