SECTION VIII 

 REFERENCES 



Black, J. J., L. M. Andrews, and C. W. Threinen. Surface 

 water resources of Vilas County. Wisconsin Conservation 

 Department. 1963. 



Blanchar, R. W. , G. Rehm, and A. C. Caldwell. Sulfur in 

 plant materials by digestion with nitric and perchloric 

 acids. Soil Sci. Soc. Amer. Proc . 29: 71-72. 1965. 



Bould,C.E., E.G. Bradfield, and G. M. Clarke. Leaf analysis 

 as a guide to the nutrition of fruit crops. I. General 

 principles, sampling techniques, and analytical methods. 

 J. Sci. Food Agr. 11: 229-242. 1960. 



Bourn, W. S. Ecological and physiological studies on certain 

 aquatic angiosperms. Contrib. Boyce Thompson Inst. Plant 

 Res. 4: 425-496. 1932. 



Chapman, H. D. The status of present criteria for the 

 diagnosis of nutrient conditions in citrus. (In) 

 Colloquium on Plant Analysis and Fertilizer Problems. 

 Publ. No. 8, A.I.B.S. Washington, D.C. 1961. 



Chapman, H. D. Diagnosis criteria for crops and soils. 

 Univ. of Calif. Div. of Agricultural Sciences. 1966. 



Fitzgerald, George P. Field and laboratory evaluations of 

 bioassays for nitrogen and phosphorus with algae and 

 aquatic weeds. Limnol. Oceanogr. 14: 206-212. 1969. 



Gerloff, G. C. and F. Skoog. Nitrogen as a limiting factor 

 for the growth of Microcystis aeruginosa in southern 

 Wisconsin lakes. Ecology 38: 556-561. 1957. 



Gerloff, G. C. Evaluating nutrient supplies for the growth 

 of aquatic plants in natural waters. (In) Eutrophication: 

 Causes, Consequences, Correctives. Proc. Symp. Nat. Acad. 

 Sci., Washington, D.C. 1969. 



Gerloff, G. C. and P. H. Krombholz. Tissue analysis as a 

 measure of nutrient availability for the growth of 

 angiosperm aquatic plants. Limnol. Oceanogr. 11: 529- 

 537. 1966. 



Goldman, C. R. Molybdenum as a factor limiting primary 

 productivity in Castle Lake, California. Science 132: 

 1016-1017. 1960. 



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