The truth about sweet clover : its value for honey, for plowing under, as a fertilizer of the soil, and food for horses, cattle, swine, sheep, etc.; and . as a valuable plant for the introduction of nitrogen-gathering bacteria
Автор: A.I. Root Company,Charles C. Miller Memorial Apicultural Library WU, 147 стр., издатель: "Книга по Требованию", ISBN: 978-5-8838-3413-3