Los Angeles County

Keywords.People.Joe Cook, Keywords.Photographers.Dell O Clark, Keywords.Places.Los Angeles County.Rio Hondo River, Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1968

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.Dell O Clark, Keywords.Places.Los Angeles County.Rio Hondo River, Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1970

Keywords.Places.Los Angeles County.Rio Hondo River, Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides).Specimens - Roots, Stems, etc, Keywords.Weeds.Ratings.A Rated, Keywords.Year.1969

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.Places.Los Angeles County.Rio Hondo River, Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1970

Keywords.Places.Los Angeles County.Rio Hondo River, Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1970

Keywords.Places.Los Angeles County.Rio Hondo River, Keywords.Weeds.Alligatorweed (Alternanthera philoxeroides), Keywords.Weeds.Ratings.A Rated, Keywords.Year.1969