English: Studies on the bulb-divison in Lilium longiflorum Part 4. : Especially on the relation between the periodic bulb development and the variation of the reserve substanees in the bulb
Japanese: 鐵砲百合の球割に關する研究 第4報 : 特に球根の發育週期と球根内貯蔵物質の消長との關係に就いて