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Title: Blackheath, ON. 1:25,000. Map sheet 030M04C, [ed. 1], 1964:
Date: 1964
Subject: , --
Identifier: macrepo:88414, local: HTDP25K030M04c_1964

Title: Blackheath, ON. 1:25,000. Map sheet 030M04C, [ed. 2], 1972:
Date: 1972
Subject: , --
Identifier: macrepo:88415, local: HTDP25K030M04c_1972