机读格式显示(MARC)

• 000 00697nam a22002651a 4500

• 001 0000332403

• 003 CAL

• 005 20200807130700.0

• 008 760313s1958 enk 000 0 eng d

• 010 __ |a ^^^58004066^

• 015 __ |a GB58-2338

• 040 __ |a SJT |c SJT

• 042 __ |a premarc

• 050 00 |a TK6553 |b .K36

• 090 __ |a TN761.2/K26

• 093 __ |a TN761.2 |2 4

• 095 __ |a 15.10102

• 099 __ |a CAL 0220110203999m

• 100 1_ |a Keen, Arthur William.

• 245 10 |a Frequency modulation; : |b an introduction to the fundamental principles.

• 260 __ |a London, : |b Pitman, |c [1958].

• 300 __ |a 274 p. : |b illus. ; |c 19 cm.

• 650 _0 |a Radio frequency modulation

• 920 __ |a 231030 |z 2

• 998 __ |a SJT