Sister Mary Helene ven Horst, science instructor at Marycrest College in Davenport, Iowa, teaches students the theory of radiation and the use of radiological monitoring instruments. A 10-hour course in radiological meter reading is taught to students at the college, and a 32-hour course in radiation physics and monitoring is taught at the adult level. Marycrest College is operated by the Sisters of the Humility of Mary

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