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The relation of the plastid to nuclear division in Anthoceros laevis. American Journal of Botany. 22:42-51.. 1935.
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The relation of phytoplankton periodicity to the nature of the physico-chemical environment in certain Michigan lakes. Doctor of Philosophy:249pp... 1952.
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The relation of oxygen consumption to substrate particle size in two burrowing mayflies. The Journal of Experimental Biology. 40:447-453.. 1963.
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The relation between evaporation and plant succession in a given area. American Journal of Botany. 4:161-178.. 1917.
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Regeneration of Hydra from the endoderm. Science. 132:678.. 1960.
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Refining correlations of water deficits and radial growth in young red pine. Ecology. 48:525-530.. 1967.
Refinement in empirical functions for realistic soil moisture regimes under forest cover. International Symposium on Forest Hydrology. :261-274.. 1967.
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Recreational response to privacy stress: a validation study. Journal Leisure Research. 11:61-73.. 1979.
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Records for the Gramineae of the Douglas Lake region, Michigan. Papers of the Michigan Academy of Science, Arts and Letters. 25:43-46.. 1940.
Recording the flight-speed of birds by Doppler radar. Living Bird. 4:79-87.. 1965.