Pasquier, Roger F. Watching birds : an introduction to ornithology / Roger F. Pasquier. ; illustrated by Margaret La Farge ; foreword by Roger Tory Peterson. - Boston : Houghton Mifflin, 1977. - xiii, 301 p. : il. Inclui índice. ISBN: 0395253438 Subjects--Topical Terms: Observação de pássaros.Ornitologia. Dewey Class. No.: 598.2