Here's the catalog entry from Indiana University Sheet Music Collections:

Title: BLUE BONNET GIRL
Composer: Spencer, Glenn
Lyricist: Spencer, Glenn
Publisher: American Music, Inc.
Place of publication: Hollywood, CA
Date of publication: 1936
Call Number: M1 .D48 Box: 066 Item: 010
Performance Medium: Piano, Voice and Chords
First Line: Down in Texas there's a blossom blooming
Chorus First Line: Blue bonnet girl, a Texas moon caresses you,
Genre: Popular song
Subject term: Sons of the Pioneers