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Realia such as maps , pictures , recordings , etc ., will be invaluable in helping you accomplish this task . She has also collaborated in chamber music concerts , recordings , radio and television programs with members of the Chicago , Montreal , Boston , Vienna and San Francisco Orchestras , among others . During a six-hour period on Thursday evening , levels fluctuated from close to 30 ppb to over 90 ppb . Based on these and previous results , levels of hydrogen sulfide appear to fluctuate widely depending on the wind direction and tide . Visit the merchandise section of UFPJ 's website today to order buttons , posters , stickers and other materials you can use as part of your third anniversary activities . Included here are many general indexes , abstracts and bibliographies not entirely devoted to African languages , but which contain substantial references to languages and linguistics in their subject classifications . The subseries includes original typescripts of Baily 's papers , abstracts for Baily articles , and handwritten and research notes by Baily , which served as background material in writing his papers .