*Valid September 30, 2024 - December 25, 2024 at Canadian stores and at indigo.ca, while quantities last, with $50.00 or more pre-tax purchase of eligible product(s), after discounts and plum points redemptions. Minimum purchase amount excludes gift cards, plum+ memberships, Love of Reading products/donations, and shipping costs. Selection may vary between stores and online.
The Manufacture of Optical Glass and of Optical Systems; a War-time Problem/en-ca/the-manufacture-of-optical-glass-and-of-optical-systems%3B-a-war-time-problem/76A28EE5-DAA3-4C9E-8C24-D08A12A30168.html76A28EE5-DAA3-4C9E-8C24-D08A12A30168
The Manufacture of Optical Glass and of Optical Systems; a War-time Problem