DSpace at My University: <html> <body> <a href="https://elibrary.asabe.org/azdez.asp?JID=3&AID=27518&CID=t1996&v=39&i=2&T=1&redirType=toc_journals.asp&conf=t">Penetration Forces at Different Soil Conditions for Punches Used on Punch Planters </a> </body> </html>