History of the vegetation of the Southern Pennines

[71] NATHORST AG, 1910, G F F STOCKHOLM, V32, P215

[72] OSTENFELD CH, 1926, DET KONGELIGE DANSKE, V6, P3

[73] OSTENFELD CH, 1925, SAERTRYK MEDDELELSER, V68

[74] OVERBECK F, 1928, Z BOT, V20, P4

[75] PEARSALL WH, 1924, NATURE 1206

[76] PEARSALL WH, 1925, NATURE 0124

[77] Penck A., 1901, ALPEN EISZEITALTER

[78] PETCH JA, 1924, TOLSON MEMORIAL MUSE

[79] PRIESTLEY JH, 1922, NATURALIST

[80] PRIESTLEY JH, 1921, NEW PHYTOL MAR

[71] NATHORST AG, 1910, G F F STOCKHOLM, V32, P215

[72] OSTENFELD CH, 1926, DET KONGELIGE DANSKE, V6, P3

[73] OSTENFELD CH, 1925, SAERTRYK MEDDELELSER, V68

[74] OVERBECK F, 1928, Z BOT, V20, P4

[75] PEARSALL WH, 1924, NATURE 1206

[76] PEARSALL WH, 1925, NATURE 0124

[77] Penck A., 1901, ALPEN EISZEITALTER

[78] PETCH JA, 1924, TOLSON MEMORIAL MUSE

[79] PRIESTLEY JH, 1922, NATURALIST

[80] PRIESTLEY JH, 1921, NEW PHYTOL MAR