6
Published 1985
National Academies Press

7
Published 1987
National Academies Press

8
Published 1970
National Academy of Sciences

11
Published 1987
National Academy Press

12
Published 2015
National Academies Press

14
by Isaacson, Richard E.
Published 2004
American Academy of Microbiology

15
by Isaacson, Richard E.
Published 2004
American Academy of Microbiology