Green Lancaster header displaying a picture of an Amish buggy, and corn field, horses in a field, cows being milked, and windmills.



Blevins, O. & Schuster, G. (2011). Concrete producer turns to BIBKO concrete reclaimer to focus on zero discharge zero waste. Highway Building: Official publication of the associated Pennsylvania constructors. 90(2), 10-12.

Blevins, O. & Cramer, M., personal communication, October 2011.

Lewis, J.A. (n.d.) The history of concrete: a timeline. Materials, Science and Technology Teacher's Workshop. Retrieved from

Stradden, K. (2011). Closing the Loop. Retrieved from php/features/12701-closing-the-loop.html



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