TY - JOUR T1 - Perennial ice covers and their influence on antarctic lake ecosystems, in Physical and Biogeochemical Processes in Antarctic Lakes JF - Antarctic Research Series Y1 - 1993 A1 - Robert A. Wharton Jr. A1 - Christopher P. McKay A1 - Gary D. Clow A1 - Dale T. Andersen VL - 59 ER -