22
Published 2014
National Academies Press

23
Published 2011
National Academies Press

24
by Cuff, Patricia A.
Published 2016
The National Academies Press

25
Published 2016
The National Academies Press

28
Published 2010
National Academies Press

29
Published 2003
U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institutes of Health

30
Published 2004
National Academies Press

31
Published 1997
National Academy Press

32
by Sawyer, Keegan, Alper, Joe
Published 2014
National Academies Press

33
Published 1983
National Academy Press

37
by Chilingerian, Jon A.
Published 1997
National Academy Press

38
Published 1993
National Academy Press

39
Published 1985
National Academy Press

40
by England, Mary Jane
Published 2012
National Academies Press