A big library may have the original edition of Child from the 1880s; a smaller one the nice paperback reprint from Dover. There's also the one-volume "student's edition brought out by Kittredge & Sargent in 1905, which gives one example (presumably the best) of all but a few ballads. --The tunes are collected in Bertrand Harris Bronson, The Traditional Tunes of the Child Ballads [along with the texts], from Princeton U.P.1959+. Four big volumes, and very well done.