000			00404nam a2200169Ia 4500
008			160615s9999 xx 000 0 und d
100			_aTWYMAN(F)
245			_aPrism and lens making- a text book for optical glassworkers.
250			_a2 ed.
260			_aLondon
260			_bAdam Hilger
260			_c1952
300			_aviii p. + 630p
942			_cBooks
999			_c3912 _d3912