@article {462,
	title = {The coastal flora of the departments of Cha{\~n}aral and Taltal},
	journal = {Contributions from the Gray Herbarium of Harvard University},
	volume = {85},
	year = {1929},
	month = {1929///},
	pages = {1 - 138},
	author = {Johnston, I. M.}
}
@article {463,
	title = {The flora of the Nitrate Coast},
	journal = {Contributions from the Gray Herbarium of Harvard University},
	volume = {85},
	year = {1929},
	month = {1929///},
	pages = {138 - 163},
	author = {Johnston, I. M.}
}
@article {405,
	title = {Studies in the Boraginaceae VII. The South American species of Heliotropium},
	journal = {Contributions from the Gray Herbarium of Harvard University},
	volume = {81},
	year = {1928},
	month = {1928///},
	pages = {3 - 73},
	url = {http://www.biodiversitylibrary.org/page/39600170},
	author = {Johnston, I. M.}
}
@article {382,
	title = {Studies in the Boraginaceae VIII. I. Observations on the species of Cordia and Tournefortia known from Brazil. 3. Treatment of Tournefortia},
	journal = {Contributions from the Gray Herbarium of Harvard University},
	volume = {92},
	year = {1930},
	month = {1930///},
	pages = {66 - 89},
	author = {Johnston, I. M.}
}
