function placeTokens(address beneficiary, uint256 _tokens) onlyAdmin public returns(bool){

    
        require(tokenRaised.add(_tokens) <= tokensForSale); 
    

        require(_tokens != 0);
        require(!hasEnded());
        if (token.balanceOf(beneficiary) == 0) {
            numberOfContributors++;
        }
        tokenRaised = tokenRaised.add(_tokens); 
        token.mint(beneficiary, _tokens);
        TokenPlaced(beneficiary, _tokens);
        return true;
    }