Now showing items 1-1 of 1

  • The Physical and Mechanical Aspects of Orthodontic Appliances 

    Bibby, R.E (University of the Western Cape, 1978)
    These laws were first published in Latin,in 1687.The first law may be literally translated thus, Every body continues in its state of reat or of uniform motion in a straight line ,unless it is compelled to change that state ...