@article {509,
	title = {Nota sobre dos Heliotropium argentinos (Boraginaceae)},
	journal = {Darwiniana},
	volume = {13},
	year = {1964},
	month = {1964///},
	pages = {67 - 71},
	author = {P{\'e}rez-Moreau,R.L.}
}
@inbook {469,
	title = {Boraginaceae},
	booktitle = {Flora of Texas},
	volume = {1},
	year = {1964},
	month = {1964///},
	pages = {123 - 221},
	publisher = {Texas Research Foundation},
	organization = {Texas Research Foundation},
	address = {Renner, Texas},
	author = {Johnston, I. M.},
	editor = {Lundell,C.L.}
}
