The definitive source for locating short stories is Short Story Index, located in Raynor Reference PN 3373 .S47
Two online sources may contain the full text of desired stories:
Literature Online (LION) is the best and most important starting place for critical journal articles about fiction. LION includes the complete contents of MLA International Bibliography and Annual Bibliography of English Language and Literature (ABELL) from 1926 to present. In addition to the complete indexes, links are provided to the full text of hundreds of journals.
From the LION home screen, click on "Criticism & Reference" in the left column; then select "Criticism" on the next screen; the resulting search screen will allow a combined search of MLAIB and ABELL.
If a citation doesn't provide a link to full text option, be sure to use the Findit@MU icon to search MARQCAT for journals, books, and chapters not included in LION.