Chemistry. Scientist working in chemical laboratory. Illustrations with test tubes, flask, beaker, tube, glasses, microscope. Doctor hand holding dropper or petri dish. Set of posters background. Poster #544319878
Chemistry. Scientist working in chemical laboratory. Illustrations with test tubes, flask, beaker, tube, glasses, microscope. Doctor hand holding dropper or petri dish. Set of posters background. Poster #544319878
