@book{206726,
	author = {Richardson, Charles H. and Shepard, Harold H.},
	title = {The effect of hydrogen-ion concentration on the toxicity of nicotine, pyridine and methylpyrrolidone to mosquito larve  /},
	note = {Sobretiro de : Journal of agricultural research 41 (4) : 337-348, 1930 Enc. con impresos similares}
}