"This issue of Journal of Physics: Conference Series contains the Proceedings of the XV International Workshop on Low Energy Positron and Positronium Physics, which was held at York University, Toronto, Canada, between 29 July and 1 August 2009."--Preface.
XV International Workshop on Low Energy Positron and Positronium Physics : 29 July to 1 August 2009, Toronto, Canada. Published by IOP Pub. in 2010. Publication and catalogue information, links to buy online and reader comments.