Provider: Japan Science and Technology Agency Database: J-STAGE Content:text/plain; charset="utf-8" TY - JOUR TI - Comparative Male Meiosis in Seven Species of Cotton Rats, Genus Sigmodon TI - AU - Zimmerman,Earl G. JO - CYTOLOGIA VL - 39 IS - 1 SP - 113 EP - 120 PY - 1974 DO - 10.1508/cytologia.39.113 ER -