[1]
H. HOOGHIEMSTRA, “POLLEN MORPHOLOGY OF THE PLANTAGO SPECIES OF THE COLOMBIAN ANDES AND ITS APPLICATION TO FOSSIL MATERIAL ”, Rev. Acad. Colomb. Cienc. Ex. Fis. Nat., vol. 15, no. 58, pp. 41–65, Dec. 1983, doi: 10.18257/raccefyn.15(58).1983.3782.