tepid
1960s
13159_22895_Agricultural_Conservation4
Scientists are testing the groundwater with beakers and a machine with…
1960s
13159_22895_Agricultural_Conservation1
A tepid and dirty canal has a special rake running through it to…
1960s
13159_22895_Agricultural_Conservation2
Aerial shots of USDA canal projects are followed buy some scientists…
1960s
13159_22895_Agricultural_Conservation3
In a factory, a flow of bell peppers is flowing past some female…