Bettelheim, C. (1963). Some basic planning problems. Asia Publishing House.
Dyfyniad Arddull ChicagoBettelheim, Charles. Some Basic Planning Problems. Bombay: Asia Publishing House, 1963.
Dyfyniad MLABettelheim, Charles. Some Basic Planning Problems. Asia Publishing House, 1963.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.