THE "MARTIN KARLSEN," A CANADIAN SHIP, IS A FLOATING LABORATORY FROM WHICH SCIENTISTS ARE ANALYZING PHYSICAL, CHEMICAL BIOLOGICAL AND METEOROLOGICAL CONDITIONS IN LAKE SUPERIOR. SUCH COMPLETE STUDY OF FRESH WATER IS CALLED LIMNOLOGY. LIMNOLOGIST ATTACHES A NANSEN BOTTLE TO A DROPLINE. THE NANSEN BOTTLE, WHOSE OPENING AND CLOSING IS CONTROLLED BY A BRASS WEIGHT, TAKES WATER SAMPLES AT SPECIFIED DEPTHS

Chicago citation style
Environmental Protection Agency. 12/2/1970. THE "MARTIN KARLSEN," A CANADIAN SHIP, IS A FLOATING LABORATORY FROM WHICH SCIENTISTS ARE ANALYZING PHYSICAL, CHEMICAL BIOLOGICAL AND METEOROLOGICAL CONDITIONS IN LAKE SUPERIOR. SUCH COMPLETE STUDY OF FRESH WATER IS CALLED LIMNOLOGY. LIMNOLOGIST ATTACHES A NANSEN BOTTLE TO A DROPLINE. THE NANSEN BOTTLE, WHOSE OPENING AND CLOSING IS CONTROLLED BY A BRASS WEIGHT, TAKES WATER SAMPLES AT SPECIFIED DEPTHS. 1973-06. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/549603. (Accessed October 16, 2018.)
APA citation style
Environmental Protection Agency. 12/2/1970, (1973-06) THE "MARTIN KARLSEN," A CANADIAN SHIP, IS A FLOATING LABORATORY FROM WHICH SCIENTISTS ARE ANALYZING PHYSICAL, CHEMICAL BIOLOGICAL AND METEOROLOGICAL CONDITIONS IN LAKE SUPERIOR. SUCH COMPLETE STUDY OF FRESH WATER IS CALLED LIMNOLOGY. LIMNOLOGIST ATTACHES A NANSEN BOTTLE TO A DROPLINE. THE NANSEN BOTTLE, WHOSE OPENING AND CLOSING IS CONTROLLED BY A BRASS WEIGHT, TAKES WATER SAMPLES AT SPECIFIED DEPTHS. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/549603
MLA citation style
Environmental Protection Agency. 12/2/1970. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/549603>.
Note: These citations are programmatically generated and may be incomplete.