Genealogy of the Ricker Family,Percy Leroy Ricker, Elwin R. Holland · First published 1996 · Latest edition 2015Open the Tome
Genealogy of the Ricker Family, Volume 1 OnlyPercy Leroy Ricker, Elwin R. Holland · First published 1996Open the Tome
Report on the Diatoms of the Albatross Voyages in the Pacific Ocean, L888-1904Albert Mann, Percy Leroy Ricker · First published 2018Open the Tome
New Asiatic Species of the Legume Genus CampylotropisPercy Leroy Ricker · First published 1946Open the Tome
The nursery and seed trade catalog collection of the United States Department of AgriculturePercy Leroy Ricker · First published 1945Open the Tome
A list of the principal reported sources of starches, waxes, gums, resins and latex in plants, available for crude field adhesivesPercy Leroy Ricker · First published 1942Open the Tome
A report on rhododendron and laurel in the North Carolina pipe industryPercy Leroy Ricker · First published 1942Open the Tome
Directions for preserving leaves for decorative purposesPercy Leroy Ricker · First published 1924Open the Tome
