Willard, Bradford, 1894-

• A Paleozoic section at Delaware water gap / by Bradford Willard
• A Paleozoic section in south-central Pennsylvania / by Bradford Willard and Arthur B. Cleaves
• Devonian faunas in Pennsylvania / by Bradford Willard
• Guide to the geology from Dauphin to Sunbury / by Bradford Willard
• Guide to the geology of the upper Schuylkill valley
• Guidebook to the geology near Reading, Pa. / by Bradford Willard and Donald M. Fraser