In the book of life, the answers aren't in the back--Charlie Brown, fictional character of the Peanuts comic strip created by Charles Schulz.
Eckerman
Keith F
KF
Menzel
Hans-G
HG
D017408:Guidelines as Topic; D006207:Half-Life; D038622:Internationality; D008093:Literature, Modern; D010506:Periodicals as Topic; D011829:Radiation Dosage; D011835:Radiation Protection / Q000592:standards*; D011868:Radioisotopes / Q000032:analysis* / Q000592:standards*; D011874:Radiometry / Q000592:standards*; D014925:Wit and Humor as Topic
D011868:Radioisotopes