TY - CHAP LA - eng PY - 1971 SN - 0-8410-1018-8 TI - On mappings of handlebodies and Heegaard splittings UR - https://nbn-resolving.org/urn:nbn:de:0070-bipr-30085 Y2 - 2024-11-22T11:10:00 ER -