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Guayule plantings are being inspected by Doctor Robert Emerson (third from right), a bio-chemist and botanist from the California Institute ...
[recto] Guayule plantings are being inspected by Doctor Robert Emerson (third from right), a bio-chemist and botanist from the California Institute ...
[verso] Guayule plantings are being inspected by Doctor Robert Emerson (third from right), a bio-chemist and botanist from the California Institute ...
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