00940nlm 2200301 a 450 99646717250331620220426103216.0978067486462719921109d1961---- uy 0engdrcnu<<An>> essay on calcareous manuresby Edmund Ruffinedited by J. Carlyle SittersonCambridge, MassBelknap Press of Harvard University Press1961Testo elettronico (PDF) (XXXV, 199 p.)John Harvard libraryBase dati testualeJohn Harvard library.ConcimiBNCF631.8RUFFIN,Edmund1794-1865.843388SITTERSON,Joseph Carlyle1911-American Council of Learned Societies.ITcbaREICAT996467172503316EBEREssay on calcareous manures2832238UNISA