Mack, W., Hale, W. B., Blashfield, D. W. C., & Buchanan, W. H. (1921). Corpus juris: And workmen's compensation acts, third volume permanent Cyc annotations : contains annotations from all cases decided since the original treatises were written : also errata corrected, new principles announced, etc. New York : London: American Law Book Co.; Butterworth & Co..

Mack, William, Wiliam Benjamin Hale, De Witt Clinton Blashfield, and William Howard Buchanan. Corpus Juris: And Workmen's Compensation Acts, Third Volume Permanent Cyc Annotations : Contains Annotations From All Cases Decided Since the Original Treatises Were Written : Also Errata Corrected, New Principles Announced, Etc. New York : London: American Law Book Co.; Butterworth & Co., 1921.

Mack, William, Wiliam Benjamin Hale, De Witt Clinton Blashfield, and William Howard Buchanan. Corpus Juris: And Workmen's Compensation Acts, Third Volume Permanent Cyc Annotations : Contains Annotations From All Cases Decided Since the Original Treatises Were Written : Also Errata Corrected, New Principles Announced, Etc. New York : London: American Law Book Co.; Butterworth & Co., 1921.