00958cam a22002891  45000010008000000030008000080050017000160080041000330100017000740350018000910400027001090420012001360500018001480820019001661000025001852450019002102500012002292600044002413000044002854400061003295040037003906500018004279060045004459420012004909990017005029520149005197414620BD-DhUL20150115151025.0730302s1948    nyua     b    000 0 eng    a   48001249   a(OCoLC)567981  aDLCcODaWUdOCoLCdDLC  apremarc00aTK7872.V3bS6  a621.38151bSPV1 aSpangenberg, Karl R.10aVacuum tubes /  a1st ed.  aNew York,bMcGraw-Hill Book Co.,c1948.  axvii, 860 p. :billus., diagrs.c24 cm. 0aMcGraw-Hill electrical and electronic engineering series  aIncludes bibliographies & Index. 0aVacuum-tubes.  a7bcbccoclcrplduencipf19gy-gencatlg  2ddccBK  c31710d31710  00102ddc406621_381510000000000_SPV708NFIC959755aDUSLbDUSLcGENd2015-01-15ePurchasedo621.38151 SPVpA54733r2015-01-15w2015-01-15yBK