1972

Keywords.Photographers.Robert G Donley, Keywords.Places.Los Angeles County.Whittier parkway, Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1972

Keywords.Activities.Hand-pulling, Keywords.People.Howell, Keywords.People.Kreps, Keywords.Photographers.Robert G Donley, Keywords.Places.Los Angeles County.San Jose Creek (near the San Gabriel River), Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1972

Keywords.Photographers.D Barbe, Keywords.Places.Santa Clara County, Keywords.Weeds.Ratings.A Rated, Keywords.Weeds.Thistles.Illyrian Thistle (Onopordum illyricum), Keywords.Year.1972

Keywords.Photographers.D Barbe, Keywords.Places.Santa Clara County, Keywords.Weeds.Ratings.A Rated, Keywords.Weeds.Thistles.Illyrian Thistle (Onopordum illyricum), Keywords.Year.1972

Keywords.Equipment.Herbicide Application Equipment.Helicopters, Keywords.Places.Los Angeles County.Whittier Narrows Golf Course, Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1972

Keywords.Photographers.W J Ferlatte, Keywords.Places.Marin County, Keywords.Weeds.Biddy-biddy (Acaena novae-zelandiae), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1972

Keywords.Photographers.D Barbe, Keywords.Weeds.Ratings.A Rated, Keywords.Weeds.Russian salt tree (Halimodendron halodendron), Keywords.Year.1972

Keywords.Photographers.W J Ferlatte, Keywords.Weeds.Ratings.A Rated, Keywords.Weeds.Russian salt tree (Halimodendron halodendron), Keywords.Year.1972

Keywords.Photographers.D Barbe, Keywords.Weeds.Ratings.A Rated, Keywords.Weeds.Russian salt tree (Halimodendron halodendron), Keywords.Year.1972