Nest ecology, productivity and growth of the loggerhead shrike on the shortgrass prairie. Porter, D.; Strong, M.; Giezentanner, J.; and Ryder, R. 1975.
bibtex   
@article{porter_nest_1975,
	title = {Nest ecology, productivity and growth of the loggerhead shrike on the shortgrass prairie},
	volume = {19},
	number = {4},
	author = {Porter, DK and Strong, MA and Giezentanner, JB and Ryder, RA},
	year = {1975},
	keywords = {SGS, production, growth, shortgrass prairie, nesting habits, loggerhead shrike}
}
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