@inproceedings{inproceedings3cbebeb2,
title   = {Effects of nitrogen sources on soybean (glycine max (l.) Merrill). I. Yield and seed physiological quality},
author = {Marcos Filho, J and Custodio, C C and Camara, G M S},
year = {1992},
publisher = {Association Internacional Seed Testing},
booktitle   = {International Seed Testing Congress}
}