TY  - BOOK
AU  - Alvin K L
AU  -  Kershaw K A
TI  - Observer's book of lichens
T2  - Observer's pocket series; 33
U1  - I27:12, K3    CS 
PY  - 1963///
CY  - London
PB  - Frederick Warne        
KW  -  Lichens
KW  - Botany
N1  - Glossary 118-121p
ER  -