କଲ୍ଟିଭେଟର୍

ଆଧାର 
 ଉପରକୁ ଯାଆନ୍ତୁ↑ "Howard, Arthur Clifford (1893–1971)" . Australian Dictionary of Biography – Online Edition. Australian National University. 1983. Retrieved 2007-07-12.
 ↑ ଏହି ଯାଏ ଉପରକୁ ଯାଆନ୍ତୁ:୨.୦ ୨.୧ Langmore, Diane (1983). "Howard, Arthur Clifford (1893–1971)" . Australian Dictionary of Biography – Online Edition. Australian National University. Retrieved 2007-07-12.
 ଉପରକୁ ଯାଆନ୍ତୁ↑ "The Howard Rotavator" . 2007-02-03. Retrieved 2007-07-12.
 ଉପରକୁ ଯାଆନ୍ତୁ↑ "Machinery Manufacturers - Secondary Tillage" . Worldwide Agricultural Machinery and Equipment Directory. 2006-11-14. Retrieved 2007-07-12.
Category:Agricultural machinery
Category:Australian inventions
Category:Gardening tools
Category:Tractors