21
Published 2003
National Academies Press (US)

23
by Longnecker, David E.
Published 2004
National Academies Press

26
Published 1991
National Academy Press

27
Published 2003
National Academies Press (US)

28
Published 1977
National Academy of Sciences

29
Published 1997
National Academy of Sciences

30
Published 1999
National Academies Press

31
Published 1992
National Academy Press

32
Published 2007
National Academies Press

33
by Bain, Lisa J.
Published 2021
The National Academies Press

34
by Neel, James V.
Published 1956
National Academy of Sciences, National Research Council