After a decade of work on the Poston papers,  John Alabaster produced a glossy book encapsulating much of the previous works.
As the title suggests, it is a full list of works published or not, set in a biographical context.  Though more expensive than earlier subsidised works, it is for anyone interested in her or neglected female composers of her era. It is available at Lulu.com page http://www.lulu.com/shop/john-alabaster/elizabeth-poston-catalogue-of-works-with-biographical-context/paperback/product-23663053.html#expand_text