Comparative biosystematics and life history of the nuthatches Sitta pygmaea and Sitta pusilla /
Norris, Robert Allen, 1922-
Comparative biosystematics and life history of the nuthatches Sitta pygmaea and Sitta pusilla / by R.A. Norris. - Berkeley ; Los Angeles : University of California Press, 1958. - 119-300 p. illus. ; 26 cm. - University of California publications in zoology, v. 56, no. 2 .
"A contribution from the Museum of Vertebrate Zoology of the University of California." Based on thesis, University of California.
Bibliography: p. 293-300.
Nuthatches.
Comparative biosystematics and life history of the nuthatches Sitta pygmaea and Sitta pusilla / by R.A. Norris. - Berkeley ; Los Angeles : University of California Press, 1958. - 119-300 p. illus. ; 26 cm. - University of California publications in zoology, v. 56, no. 2 .
"A contribution from the Museum of Vertebrate Zoology of the University of California." Based on thesis, University of California.
Bibliography: p. 293-300.
Nuthatches.