References

References
GILCREAS, F.W. 1965. Standard methods for the examination of water and waste water. New York: American Public Health Association.
Gilcreas
Standard methods for the examination of water and waste water
1965
JAMES, D.E. 1974. Culturing algae. Burlington: Carolina Bio- logical Supply Company.
James
Culturing algae
1974
NEEDHAM, J., and NEEDHAM, P. 1969. A guide to the study of fresh-water biology. San Francisco: Holden - Day, Inc.
Needham
A guide to the study of fresh-water biology
1969
PRESCOTT, G.W. 1978. How to know the fresh-water algae. Dubuque: William C. Brown Company.
Prescott
How to know the fresh-water algae
1978
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