[09-05] Photographing Flowers and Insects
Photographing Flowers and Insects Author: Eldredge, Arthur G.
[09-04] Tests on the Comparative Friability of Illinois Coals and their Practical Application
Tests on the Comparative Friability of Illinois Coals and their Practical Application Author: Mylins, L.A.
[09-03] Purification of Sewage by Aeration in the Presence of Activated Sludge
Purification of Sewage by Aeration in the Presence of Activated Sludge Author: Bartow, Edward
[09-02] Stellar Photometry
Stellar Photometry Author: Stebbins, Joel
[09-01] Life and Work of John Ulric NEF
Life and Work of John Ulric NEF Author: Stieglitz, Julius