0 4 0 9 3 1 0 5 / http :// www . ey e anti ques . com / View ing Inst ru ments / Graph os cope . htm ▁http :// www . bd cm useum . org . uk / expl ore / item / 6 9 0 6 8 / ▁https :// web . archive . org / web / 2 0 1 6 0 3 0 5 0 8 0 5 1 4 / http :// www . ge org eg la zer . com / arch ives / dec arts / inst ru ments / st ere os cope . html ▁https :// web . archive . org / web / 2 0 0 9 1 0 2 6 2 2 4 4 5 3 / http :// ge oc ities . com / mb arel . geo / k omb i . html ▁https :// web . archive . org / web / 2 0 1 7 1 2 3 1 1 9 5 5 3 9 / http :// c ourses . n css m . edu / g allery / collections / to ys / html / ex hib it 1 2 . htm ▁ ▁References ▁ ▁Category : Opt ical ▁devices <0x0A> </s> ▁There ▁have ▁been ▁concerns ▁and ▁controvers ies ▁about ▁the ▁ 2 0 2 2 ▁Winter ▁Olympics ▁which ▁will ▁be ▁hosted ▁in ▁Be ij ing , ▁China . ▁ ▁Organ izing ▁concerns ▁and ▁controvers ies ▁ ▁Cost ▁and ▁climate ▁Several ▁cities