Scholars to this day treat Bowers ' scholarly guide as authoritative .
Fredson Bowers described and formulated a standardized practice of descriptive bibliography in his Principles of Bibliographical Description ( 1949 ) .
Scholars to this day treat Fredson Bowers ' scholarly guide as authoritative .
Fredson Bowers described and formulated a standardized practice of descriptive bibliography in his Principles of Bibliographical Description ( 1949 ) .