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69493
Project Gutenberg
PGUSA
eng
TxAuBib
Heffron, Ida Cassa.
Lessons in chalk modeling
[Gutenberg] :
The new method of map drawing /
Ida Cassa Heffron.
Project Gutenberg,
2022.
Project Gutenberg ;
69493
Public domain in the USA.
Electronic text.
Project Gutenberg ;
69493.
http://www.gutenberg.org/ebooks/69493