000			00379nam a2200157Ia 4500
008			160615s9999 xx 000 0 und d
100			_aPARKER(Sybil P)
245			_aCommunications source book
260			_bMcGraw-Hill
260			_c1988
300			_a359 p.
440			_aMcGraw-Hill Science Reference Series
942			_cBooks
999			_c17782 _d17782