共 87 条
[41]
LOUGHLIN GF, 1905, CONN STATE GEOL NAT, V4
[42]
LUNDQVIST G, 1927, BINNENGEWASSER, V2
[44]
MEINKE HERBERT, 1927, BOT ARCH [KONIGSBERG], V19, P380
[45]
Nichols G.E., 1920, B TORREY BOT CLUB, V47, P511, DOI [10.2307/2479953, DOI 10.2307/2479953]
[46]
Nichols G.E, 1918, T CONNECTICUT ACAD A, V22, P249
[47]
Nichols G.E., 1913, TORREYA, V13, P199
[48]
Nichols G.E., 1914, TORREYA, V14, P167
[49]
Nichols G.E., 1916, B TORREY BOT CLUB, V43, P235