A lab technician of the Animal Diseases Research Insitute within the Ministry of Water and Life Development conducting seated next to an infrared spectroscopic transmitting machine using the Kjelldahl method for tests on plant specimens for certain substa

© UNFAO A lab technician of the Animal Diseases Research Insitute within the Ministry of Water and Life Development conducting seated next to an infrared spectroscopic transmitting machine using the Kjelldahl method for tests on plant specimens for certain substa

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