Chl-76 small-size passive hydrogen frequency and time standard
2011 ◽
1954 ◽
Vol 42
(9)
◽
pp. 1349-1349
◽
1938 ◽
Vol 50
(3)
◽
pp. 413-426
◽
1958 ◽
Vol I-7
(3 & 4)
◽
pp. 201-202
◽