What has the author Delia Chiaro written?

Delia Chiaro has written a number of books, but she is most well-known for her work on the "Oxford Learner's Dictionaries". She has been a lead editor and contributor to this series for many years.

Here are some of her key contributions:

* Oxford Learner's Dictionary of Academic English (OLDAE): This dictionary, published in 2008, is a key resource for students studying in English. It focuses on vocabulary specific to academic contexts.

* Oxford Learner's Dictionary of English Grammar: This dictionary, published in 2010, provides explanations and examples of English grammar.

* Oxford Learner's Dictionary of English Usage: This dictionary, published in 2018, explains common grammar and usage problems in English.

Besides these, she has also contributed to other Oxford dictionaries and language learning materials.

It's worth noting that "Delia Chiaro" might refer to several authors, as this name is not particularly unique. However, based on the information available, this Delia Chiaro is most likely the one associated with the Oxford Learner's Dictionaries.