Results 221 to 230 of about 4,847 (242)

Combination Plow

Scientific American, 1887
openaire   +1 more source

Improved Plow

Scientific American
  +4 more sources

Plowing Under

2015
openaire   +1 more source

Improved Plow

Scientific American, 1886
openaire   +1 more source

plow (US)

2014
openaire   +2 more sources

Plow Improvement

Scientific American
openaire   +1 more source

PLOW ON!

Equity & Excellence in Education, 1972
openaire   +1 more source

Steam Plow

Scientific American
openaire   +1 more source

Deep Plowing

2020
openaire   +1 more source

Plowed Under

2009
openaire   +1 more source