(BAUM,L.FRANK). HIDDEN VALLEY OF OZ by Rachel R. Cosgrove. Chic: Reilly & Lee (1951). 4to, blue cloth, FINE in dw with a few small chips. 1st ed. later printing. H-G XXXIX illustrated by DIRK with color cover, pictorial endpapers and many b&w's in text. Surprisingly scarce in the dw.