00631cam a2200193 7i4500 0000013687 20170414090000.0 20170414084952.0 170414 enk BI NM BS 3664 1963 British Standards Institution Specification for film badges for personnel radiation monitoring British Standards Institution. London: British Standards Institution, 1963. 12 p.: ill.; 21 cm.. British standards Radiation -- Measurement NM 0000004771 Book Standards HQ Library