Comprehensive database of original works written for the standard string quartet during the twentieth century. The sources of information include publishers' list, music reference materials, data from national music information centers, programmes, composers' correspondence and other publicity materials. Lawrence lists countries that have produced string quartets throughout the century, as well as the context of a composer's string-quartet output within the wider range of his/her work. Lawrence's book is a solid, comprehensive basis for investigation, welcome in universities and conservatories, as well as in any music enthusiast's library.