An ongoing objective of ICRP is to evaluate dose coefficients (doses per unit intake) for members of the public. The purpose ofICRP Publication 71 is to provide updated inhalation dose coefficients for selected radioisotopes of hydrogen, carbon, sulphur, calcium, iron, cobalt, nickel, zinc, selenium, strontium, zirconium, niobium, molybdenum, technetium, ruthenium, silver, antimony, tellurium, iodine, caesium, barium, cerium, lead, polonium, radium, thorium, uranium, neptunium, plutonium, americium and curium. Age-dependent biokinetic models for calcium, curium and for decay products formed following the intake of lead, radium, tellurium, thorium and uranium are provided in annexes.