The efect of soil moisture on the establishment of spruce reproduction in british columbia / Percy Munson Barr. - New Haven : Yale University, 1930
. - 77, [18] p., [2] p.desdobráveis ; 23 cm. - (Scool of Forestry) ; 26
ARQ-9038
. - 77, [18] p., [2] p.desdobráveis ; 23 cm. - (Scool of Forestry) ; 26
ARQ-9038