TY - BOOK AU - Comar, C.L. TI - Radioisotopes in biology and agriculture: principles and practice U1 - 571.45 21st ed. PY - 1955/// CY - New York PB - McGraw-Hill KW - Radiobiology KW - Radioisotopes in agriculture KW - Radioisotopes in biology N1 - 427-81 includes index ER -