Which reference materials would probably not be helpful for the following assignment? Select all that apply. Linda needs to write a research paper about the state of Iowa. b. dictionary encyclopedia card catalog music index librarian gazetteer telephone directory vertical file thesaurus

Dictionary - she knows the language so I don't think so.Encyclopedia - that's the first thing she should take a look atCard catalog - probably yes if she wants to know what's stored at local librariesMusic index - it might come in handy when writing about Iowa's culture, but I don't think it's necessary for herLibrarian gazetteer - it could help her to find out some info about most crucial regionsTelephone - if she's not sure of something she found out in other sources, she might want to use a phone and ask for further assistance herselfDirectory - it shouldn't be necessary - all important info shoul be found in other sourcesVertical file - sure, it's always a rich source of various infoThesaurus - I don't think she would need that for anythingI hope that's more less what you asked for :)

Answer:All of themExplanation: