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Wilk's seeds : "a growing necessity", 1931
The Sphagnaceæ or peat-mosses of Europe and North America
Melrose Gardens 1957
Wilk's seeds : "a growing necessity", 1930
Forage crops in Denmark. The feeding value of roots, selected strains of roots and grasses, guarantees in the trade in seed
Bobbink & Atkins [catalog]
Autumn planting 1952
Autumn planting 1953
On Cephalozia (a genus of Hepaticae), its subgenera and some allied genera
Boddington's garden guide : autumn 1910