Worldcat: McGill's main library catalogue. Search here to find all books, databases, e-books and e-resources, and some articles. Allows for basic keyword search (think Google) and also advanced searching by keyword, subject, title, and author, and possibility to limit by date range. Use lefthand sidebar on results page to narrow down your search results by year, format, topic, etc.
? or * e.g. sociolog*
will retrieve catalogue records containing the words sociology, sociological, sociologists, etc.
"_____", e.g. "medical sociology"
will retrieve catalogue records containing the entire phrase medical sociology, instead of searching by the two words separately
( ), AND, OR, NOT e.g. gender AND (sociology OR "medical sociology")
will retrieve catalogue records containing the word gender AND either sociology OR the phrase medical sociology