TY  - BOOK
AU  - Hallett, Ellen Kathleen
TI  - Blue print and dyeline for schools
AV  - TR921 .H3
U1  - 772.22 
PY  - 1963///
CY  - London
PB  - Faber and Faber
KW  - Blueprinting
KW  - Diazotype
ER  -