机读格式显示(MARC)

• 000 00749nam a2200265 4500

• 001 0000362088

• 003 CAL

• 005 20201029154900.0

• 008 760527s1973 enka b f00010 eng

• 010 __ |a 75302329

• 015 __ |a GB74-02848

• 020 __ |a 0114800332

• 040 __ |c WUL

• 090 __ |a P19/E78

• 093 __ |a P19 |2 3rd

• 099 __ |a CAL 022000375047

• 100 1_ |a Essen, L. |0 CAL n2005070095# |7 ba0yba0y

• 245 14 |a The measurement of frequency and time interval / |c [by] L. Essen.

• 260 __ |a London : |b H.M.S.O., |c 1973.

• 300 __ |a iii-v, 55 p. : |b illus. ; |c 21 cm.

• 504 __ |a Includes bibliography (p. 55).

• 650 _0 |a Atomic clocks.

• 650 _0 |a Frequencies of oscillating systems |x Measurement.

• 920 __ |a 242010 |z 1

• 998 __ |a WUL