Books, Brochures, and Chapters>Book:  Carson , Rachel (2002), Silent Spring, Houghton Mifflin Harcourt, Retrieved on 2015-03-07

Source Material [books.google.com]

Periodicals>Journal Article:  Fisher, Ronald Ayhner (1973), Perspectives in Biology and Medicine, Retrieved on 2014-01-22

Books, Brochures, and Chapters>Book:  Gould , Stephen Jay (1992), Ever Since Darwin, W. W. Norton & Company, Retrieved on 2013-06-10

Source Material [books.google.com]

Books, Brochures, and Chapters>Book:  Steinbeck , John and Ricketts , Edward F. (2009-07-08), Sea of Cortez: a Leisurely Journal of Travel and Research, Penguin Books, Retrieved on 2012-06-23

Source Material [books.google.com]

Books, Brochures, and Chapters>Book:  Scrope , George Poulett (1825), Considerations on volcanos, Phillips, Retrieved on 2012-06-22

Source Material [books.google.com]

Books, Brochures, and Chapters>Book:  Revelle , Dorfman , Rogers (1997-08-01), Science with a human face, Harvard Univ Pr, Retrieved on 2012-06-21

Source Material [books.google.com]

Books, Brochures, and Chapters>Book:  Marsh , George Perkins (1864), Man and nature; or, Physical geography as modified by human action, Retrieved on 2012-06-12

Source Material [books.google.com]

Books, Brochures, and Chapters>Book:  Leopold , Aldo and Schwartz , Charles W. (1989-06-15), A Sand County Almanac, and Sketches Here and There, Oxford University Press, USA, Retrieved on 2012-06-11

Source Material [books.google.com]

Books, Brochures, and Chapters>Book:  Hooke , Robert (1667), Micrographia: or, some physiological descriptions of minute bodies made by magnifying glasses. With observations and inquiries thereupon, Retrieved on 2012-06-05

Source Material [books.google.com]

Books, Brochures, and Chapters>Book:  Raymo , Chet (1999-07-15), Natural prayers, Ruminator Books, Retrieved on 2012-04-14

Source Material [books.google.com]