Author talk:William Ruskin Butterfield

Some more bibliographic information

• Butterfield 1906: OCLC:31842583^{all editions}
• Butterfield 1908: OCLC:61636043^{all editions}
• Butterfield 1910: OCLC:1008141855^{all editions}
• Butterfield 1911: OCLC:863486474^{all editions}
• Butterfield & Davenport 1913: OCLC:1112828365^{all editions}
• Butterfield 1935: OCLC:499679578^{all editions}