Instruction and study (3) Implements (3) Instruments (3) Methods (3) Identification (3) Triple-helix-forming oligonucleotides (3) Waxes (3) Time (3) Pharmacopoeias (3) Parchment (3) Papyrus (The plant) (3) Ink (3) Compasses (Mathematical instruments) (3) Calamus (3) Breast (3) Methods (3) Manuscripts (Papyri) (3) Identification (3) Reading (3) Research (3) Writing (3) Measurement (3) Graphemics (3) Evolution (3) Practice (3) Pergamino (3) Papiro (3) Identificación (3) Farmacopeas (3) Mamas (3)