Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1908)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1909)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1910)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1911)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1912)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1913)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1914)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1915)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1916)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1917)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1918)

Horticulture - Pennsylvania Horticultural Society. (Horticulture Pub. Co, 1919)

Hortus Veitchii : a history of the rise and progress of the nurseries of Messrs. James Veitch and sons, together with an account of the botanical collectors and hybridists employed by them and a list of the most remarkable of their introductions - Veitch, James Herbert, 1868 -1907 (J. Veitch & sons, 1906)

Hosea Waterer Golden Anniversary, 1892-1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hosea Waterer, 1942)

Hosea Waterer's bulbs : Autumn 1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hosea Waterer, 1925)

Hosea Waterer's catalogue of high grade bulbs : 1921 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hosea Waterer, 1921)

Hosea Waterer's catalogue of high grade bulbs : 1922 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hosea Waterer, 1922)

Hosea Waterer's seed catalogue. 1919 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hosea Waterer, 1919)

Hosea Waterer's seed catalogue : 1920 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hosea Waterer, 1920)

Hosea Waterer's seed catalogue : 1921 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hosea Waterer, 1921)

Hosea Waterer's seed catalogue : 1923 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Hosea Waterer, 1923)