01254nam a2200205Ia 4500 CTU_168203 210402s9999 xx 000 0 und d 40.00 693.5 C744 Concrete systems for homes and low-rise construction : a Portland Cement Association guide Pieter A. VanderWerf ...[et al] New York McGraw-Hill 2006 In the 1990s, influenced by the deconstructionist movement in literary theory and trends toward revisionist history, a cadre of academics and historians led by William Cronon began raising provocative questions about ideas of wilderness and the commitments and strategies of the contemporary environmental movement. While these critiques challenged some cherished and widely held beliefs -- and raised the hackles of many in the environmental community -- they also stimulated an important and potentially transformative debate about the conceptual foundations of environmentalism. Concrete houses,Precast concrete,Concrete products,Bê tông nhà,Bê tông đúc sẵn,Sản phẩm bê tông Trinh Trung tâm Học liệu Trường Đại học Cần Thơ