[An examination of dental X-ray units in 1988-1990].
Einarsson
G
G
Walderhaug
T
T
D006801:Humans; D007055:Iceland; D011829:Radiation Dosage; D011861:Radiography, Dental / Q000295:instrumentation*
Eftirlit med tannröntgentaekjum 1988-1990.