Author: Borror, Donald J.,
Title: Songs of Eastern Birds.
Description: NY, Dover/Ohio State Univ, (1970). VG PB plus one cassette in box (50 minutes). Songs of 60 species of birds arranged by complexity on tape recorded in field by author, noted bird watcher & ornithologist. Booklet has illus of bird & a short description of their song, table showing location & month in which songs were recorded, and sound spectrographs of the bird songs & calls prepared by a Vibralyzer with frequencies of songs & pitch. Cassette box has edge wear.

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