Geographical guide to floras of the world : an annotated list with special reference to useful plants and common plant names : Part II, Western Europe : Finland, Sweden, Norway, Denmark, Iceland, Great Britain with Ireland, Netherlands, Belgium, Luxembourg, France, Spain, Portugal, Andorra, Monaco, Italy, San Marino, and Switzerland - Blake, S. F. (Sidney Fay), 1892 -1959 (U.S. Dept. of Agriculture, 1961)

Geographical guide to floras of the world : an annotated list with special reference to useful plants and common plant names : Part 1. Africa, Australia, North America, South America, and islands of Atlantic, Pacific, and Indian oceans / by S.F. Blake and Alice C. Atwood - Blake, S. F. (Sidney Fay), 1892 -1959 (U.S. Dept. of Agriculture, 1942)