Margulis L., Sagan D., 1991
Margulis L., Sagan D. 1991. Microcosmos four billion years of microbial evolution // Simon and Schuster.New York.P.66.
Margulis L., Sagan D. 1991. Microcosmos four billion years of microbial evolution // Simon and Schuster.New York.P.66.
