Richard M. Helwig

• Along the river of the Miamis
• Defiance County (Ohio Ghost Towns No 10)
• Franklin County (Ohio Ghost Towns No 53)
• Ghost towns of northwestern Ohio
• Great winds in the valley
• Henry County (Ohio Ghost Towns No 11)
• Hunting for (arrowheads) projectile points in Ohio
• Lucas County (Ohio Ghost Towns No 3)
• Ohio ghost towns
• Stone age man in the Ohio country
• Stories in stone from the Ohio country