TY  - SER
TI  - Chemical age
SN  - 0009-2312
PY  - 1917///-
CY  - London
PB  - Morgan Grampion
N1  - UKM: v.110-122 (1975-1981); Lihat juga supplement: chemical age surveys. Mulai 1982 ditukar kepada manufacturing chemist and acrosat news
ER  -