ORNITHOLOGY -- OORT, E.D. v. Ornithologia Neerlandica. De vogels van Nederland. 's-Grav., 1922-39. 6 vols., incl. index. W. 407 cold. collotype full-p. plates after drawings by M.A. Koekkoek. Fol. & sm-8°. Cont. black h. mor. extra w. raised bands w. dec. gilt backs, t.e.g. (5) and ocl. w. dust-j. The folio volumes in cardboard boxes and in their protective wrappers. (Vol. 1 w. some very small leather scratches in places, a bit age-toned/foxed (as usual) throughout, but in mint condition).