Palo Verde Valley wheatfield borders on the Colorado River, May 1973. Photographer: O'Rear, Charles. Original public domain… https://www.rawpixel.com/image/8799827/photo-image-plant-vintage-public-domainFree Image from public domain licenseSign along the Colorado River--misspelled but clear, May 1972. Photographer: O'Rear, Charles. Original public domain image… https://www.rawpixel.com/image/8799698/photo-image-public-domain-textFree Image from public domain licenseMAY 15 Firefighters practice attack on mock fireKINGMAN, AZ - MAY 15: Wildland firefighters from the Kingman district climb… https://www.rawpixel.com/image/9653577/photo-image-person-fire-public-domainFree Image from public domain licenseFishing the Colorado River with no strain, May 1972. Photographer: O'Rear, Charles. Original public domain image from Flickr https://www.rawpixel.com/image/8770771/photo-image-person-soil-carFree Image from public domain license