The year book for 1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, 1945)

The Year book for 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1950)

The Year book for 1951 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1951)

The Year book for 1952 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1952)

The Year book for 1953 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1953)

The Year book for 1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, Inc, 1954)

Zeitschrift des Mährischen Landesmuseums - Hucke, Karl. (Die Gesellschaft, 1907)

Zeitschrift für die gesammten Naturwissenschaft - Naturwissenschaftlicher Verein für Sachsen und Thüringen in Halle. (Wiegandt, Hempel & Parey, 1860)

Ziva : casopis pro biologickou práci - Akademie ved Ceské republiky (Academia, 1858)

Zoe:a biological journal (Zoe Publishing Co, 1891)

The Zoologist : a monthly journal of natural history (1859)

Zytologische Studien über die Gattung Rosa - Täckholm, Gunnar, 1891 -1933 (Almqvist & Wiksells boktr, 1922)