000			00404nam a2200169Ia 4500
008			160615s9999 xx 000 0 und d
100			_aMASON(Warren P)
245			_aElectromechanical transducers and wave filters
250			_a2 ed.
260			_aToronto
260			_b"D. Van Nostrand Co.,"
260			_c1948
300			_av p. + 419
942			_cBooks
999			_c4620 _d4620