L-block: A type concrete block adapted to the economical constructuion of farm b
Davidson, J.B., Giese, H.
L-block: A type concrete block adapted to the economical constructuion of farm b - Ames 1928 - 225-247 p. - Iowa Agricultural Experiment .
L-block: A type concrete block adapted to the economical constructuion of farm b - Ames 1928 - 225-247 p. - Iowa Agricultural Experiment .