共 47 条
[1]
ARND T, 1914, LANDW JB, V47, P371
[2]
*ASS OFF AGR CHEM, 1920, METH ASS OFF AGR CHE, P417
[3]
ATKINS WRG, 1923, P ROY DUBLIN SOC, V17, P201
[4]
CHANCERL L, 1914, REV GEN BOT, V25, P83
[5]
Coupin H, 1917, CR HEBD ACAD SCI, V164, P641
[6]
ECKERSON SH, 1917, WASH AGR EXP STA B, V139, P1
[7]
EHRENBERG P, 1922, BODENKOLLOIDE, P717
[8]
EHRENBERG P, 1919, LANDW JB, V54, P1
[9]
EMERSON P, 1922, J AM SOC AGRON, V14, P182