Hutagalung, P. (Pantas). (1988). Cost analysis of construction equipment / by P. Hutagalung. Roorkee, India:: Walter Resources Developmnet Training Centre University of Roorkee,.
Hutagalung, P. (Pantas). Cost analysis of construction equipment / by P. Hutagalung. Roorkee, India:: Walter Resources Developmnet Training Centre University of Roorkee,, 1988
Hutagalung, P. (Pantas). Cost analysis of construction equipment / by P. Hutagalung. Roorkee, India:: Walter Resources Developmnet Training Centre University of Roorkee,, 1988.