Wikimedi'Òc

CALIFORNIA-SANTA CRUZ - NARA - 543221.jpg - US National Archives bot

CALIFORNIA FISH AND GAME BIOLOGISTS TAKE WATER SAMPLES AT "GOOSE FLATS" ON THE COLORADO RIVER. THEY TEST FOR... - NARA - 548873.jpg - US National Archives bot

T.D.S. (TOTAL DISSOLVE SOLIDS) METER MEASURES SALINITY FROM DISSOLVED SOLIDS. READING OF THE COLORADO RIVER, HERE... - NARA - 549052.jpg - US National Archives bot

CALIFORNIA FISH AND GAME BIOLOGISTS TAKE WATER SAMPLES FROM "GOOSE FLATS" SECTION OF THE COLORADO RIVER. THEY TEST... - NARA - 549059.jpg - US National Archives bot

CALIFORNIA FISH AND GAME BIOLOGIST CHECKS SAMPLE TAKEN FROM COLORADO RIVER FOR OXYGEN CONTENT - NARA - 549061.jpg - US National Archives bot

CALIFORNIA FISH AND GAME BIOLOGIST ON THE COLORADO RIVER REGULAR CHECKS ARE MADE OF RIVER'S TEMPERATURE, OXYGEN... - NARA - 549062.jpg - US National Archives bot

CALIFORNIA FISH AND GAME BIOLOGIST CHECKS GILL NETS PLACED IN THE COLORADO RIVER. NETS WILL PROVIDE DATA ON THE... - NARA - 547713.jpg - US National Archives bot

CALIFORNIA FISH AND GAME BIOLOGISTS TAKE WATER SAMPLES FROM THE COLORADO RIVER AT "GOOSE FLATS" IN THE PALO VERDE VALLEY - NARA - 547718.jpg - US National Archives bot

CALIFORNIA FISH AND GAME BIOLOGIST CHECKS GILL NETS PLACED IN THE COLORADO RIVER. NETS PROVIDE DATA ON THE NUMBER OF... - NARA - 547723.jpg - US National Archives bot

California-fish-and-game-biologist-checks-gill-nets-placed-in-the-colorado-river-nets-provide-data-on-the-number-of-fish-in-the-area-may-1972 7136377467 o.jpg - Artix Kreiger

California-fish-and-game-biologist-checks-gill-nets-placed-in-the-colorado-river-nets-will-provide-data-on-the-number-of-fish-in-the-area-may-1972 6990243952 o.jpg - Artix Kreiger

California-fish-and-game-biologist-checks-sample-taken-from-colorado-river-for-oxygen-content-may-1972 7006619600 o.jpg - Artix Kreiger

California-fish-and-game-biologist-on-the-colorado-river-regular-checks-are-made-of-rivers-temperature-oxygen-content-salinity-level-and-fish-content-may-1972 7006623318 o.jpg - Artix Kreiger

California-fish-and-game-biologists-take-water-samples-at-goose-flats-on-the-colorado-river-may-1972 7136516237 o.jpg - Artix Kreiger

California-fish-and-game-biologists-take-water-samples-from-goose-flats-section-of-the-colorado-river-may-1972 7006616598 o.jpg - Artix Kreiger